Sourdough Diaries: The Beginning—Introducing Ezekiel and How and Why to Make a Sourdough Starter

Feb 12 2010

This is Ezekiel:

a grainy, cameraphone picture that would totally be his f'book profile pic if i ever got crazy enough to make him one

In some ways, naming your starter seems completely natural—it bubbles and teems with life, eats and excretes, requires maintenance, and, if neglected, will die. It’s a little like a very quiet, low-maintenance pet. I named the other two starters I cultivated, too: Isaiah, who I converted from an Amish friendship bread starter which probably initially included sugar and milk to a far more Spartan diet of whole wheat flour and water and then killed because I suspected the friendship starter relied on active dry yeast and I wanted a “wild” starter (I’ll explain the scare quotes in a minute) and Esther, who I stopped baking with and eventually let suffocate and die in her own excrement.

It’s not just me. I also know of a Lisette, a Philemon, and a Mr. Googly (gluten free). And Amish friendship bread starters, which are a kind of sourdough starter, were so often called  “Herman starters” or simply “Hermans” that there are still dozens of recipes out there that call for “1/2 cup Herman.” I really tried to figure out why and for a minute, this wiki page made me think it was something German passed down through the Pennsylvania Dutch that just happened to be a common name…until I noticed that even “Herman-Teig” has only been well known since the “1980er.” Which is about when most people's fond memories of their mothers or aunts caring for and baking with “Hermans” date from (likely influenced by the 1970s Earth Mother vogue and what Warren Belasco has called the “countercuisine”). Also challenging the Pennsylvania Dutch theory: the English-language wiki claims that Elizabeth Coblentz, author of “The Amish Cook” said the rich cinnamon coffeecake that people sometimes flavor with instant pudding mix was nothing like Old Amish “friendship bread.” So while I’m skeptical, I have nothing to definitively dispute stories like this one from Uncle Phaedrus, Finder of Lost Recipes:

"Herman is a name that was given to a sourdough starter many years ago when a young girl (probably in San Francisco) watched her mother making sourdough. The mother explained that the sponge was a living thing and needed to be feed and watered. The little girl, in the way of little girls everywhere and everywhen, decided that it needed a name like everything else that was alive, and some things that weren't. After due consideration, she bestowed the name "Herman" upon it.

Like most good things the mother wanted to share the starter with her friends. Along with the starter went the anecdote of her daughter's naming the sponge. As friends gave this starter to other people, they also received the story of the little girl. To this day "Hermans" seem to pop up among sourdough aficionados everywhere, all due to a little girl and her need for everything to have a name. "


But the sad stories of Isaiah and Esther start to suggest some of the ways the “pet” analogy breaks down: it’s a pet that you routinely kill and eat every week or so, but that nonetheless can live for centuries in the right conditions—something between Rose Nyland’s pet cow and octogenarian Penn State football coach Joe Paterno. There are websites that will sell you starters that supposedly have special historical/regional pedigrees, and even one with information on how to get a starter that was carried west on the Oregon Trail in 1847 for free (in memory of Carl T. Griffith who, as the site claims, “gave a sourdough starter to anyone who asked, or who sent him a self-addressed stamped envelope.”) [A minor aside to the two people who’ve landed on this site in a google search for “oldest verified sourdough starter,” if you didn’t leave in a huff at my blog’s irrelevance never to return: I’m sorry to say I have no idea.]

Furthermore, I’m not totally sure what I’m referring to when I talk about “Ezekiel.” Is he (or should that be “it” or “they”? Is it totally perverse to assign my starter a linguistic gender?) just the particular strain(s) of yeast I’ve cultivated or is/are he/it/they the fermenting flour and water paste? The problem with the former is that I can change the kind of yeast living in the culture by changing how I feed him/it/them or what temperature I store (oh hell with it, if it’s perverse, it’s perverse:) him at. The problem with the latter is that I add about 1 1/2 cups of fresh flour and water every week, and remove about the same amount. I could convert him almost entirely to a new kind of flour in about a week’s time, in which case almost none of the original Ezekiel would be left. The compulsion to assign your starter a unique name seems, instead, like a symptom of the being-a-foodie-makes-me-special nature of most contemporary sourdoughing. No offense meant—I’m clearly guilty of it, too.mid-refresh

Anyhow, I won’t deny that I’m fond of Ezekiel, and maybe sometimes even a little stupidly proud in what only a non-parent could call a “maternal” way: My yeast culture! He’s 19 months old! And already he’s leavened everything from naan to chocolate cake! So, below the jump, instructions for one way to make your own little mason jar full of joy and fermented flour paste…oh, and an explanation about what a sourdough starter is in the first place.

dry and cake yeast, from the excellent Cooking for Engineers: at its most broadly defined is some combination of powdered grains or legumes and moisture, usually water, heated (Harold McGee offers a much better explanation of what actually happens to the proteins and starch and gas cells in the dough if you’re into that sort of thing). There are two basic kinds of bread: unleavened and leavened, a distinction relevant mostly to observant Jews who don’t eat leavened, or risen, bread during Passover (“the festival of unleavened bread”) to commemorate the exodus of Israelites from slavery in Egypt, when supposedly they had to leave so quickly, they didn’t have time to let their bread rise. There are multiple ways of leavening bread, including mechanical leaveners, like egg whites that have air literally beaten into them, chemical leaveners like baking soda and baking powder, and yeast.

from When using yeast to leaven bread, most contemporary bakers use active dry yeast or yeast cake purchased separately from the other ingredients in the bread. However, yeast exists…everywhere. It’s in the air, it’s in the soil, and it’s definitely present in, around, and on everything that ferments. The white bloom on grapes: yeast. The specific restrictions on what counts as “leavened” bread for observant Jews are actually relevant to the explanation of what sourdough is and how you make it: in order to be kosher for passover, bread made from wheat, barley, spelt, rye and/or oat flour must be baked within 18 minutes of being moistened with water. The reason for that is that there is yeast in grain flours, and once moistened, it will start to eat the starches in the wheat and produce gas—leavening the dough.

Some people will claim that the yeast in sourdough starters made without commercial yeast is coming from the air—and while that’s theoretically possible, it’s sort of unlikely. That’s why sourdough doesn’t rely on “wild” yeast. Yeast were probably one of the first domesticated organisms. For humans relying on agriculture for food—so basically everyone since people settled in cities, the literal dawn of civilization—fermentation made long-term food storage possible and made many nutrients more available. So yeasts likely developed in symbiotic fashion along with many agricultural products like grapes and wheat.

But there’s not enough yeast in most flour or in the air to leaven bread much, at least not before other kinds of bacteria and mold begin to grow. So that’s where the sourdough starter comes in handy—it’s a yeast culture developed specifically for the kind of flour you use and the specific conditions of the kitchen where you bake. And once you get that much yeast going in a flour-water paste, they produce a lot of byproducts like ethanol and lactic acid, which prevent other things from growing.

There are lots of reasons besides foodie cred or lack of access to active dry yeast why you might want a sourdough starter—1) it’s cheaper, because yeast is basically the most expensive part, per weight, of bread baking (unless for some reason you’re baking with saffron or vanilla beans), 2) the byproducts are flavorful, so while you have to let it rise a long time to get something that will taste like a real sourdough, you’ll still get more-bready breads with a sourdough starter compared to packaged yeast, 3) it may be healthier? There have been at least a few studies suggesting that fermentation makes the nutrients in flours more available and moderates the effect carbohydrates have on your blood sugar—I’ll look into this more some other time, this entry has already gotten a little out of hand and I haven’t even started explaining the process yet and 4) it will compel you to bake weekly or at least semi-weekly, which I know has improved my quality of life.

Also, it’s really easy, or at least it was for me (a friend in Australia has had some issues, and I wonder if there are some more aggressive molds there…). Anyhow, theoretically, all you have to do is combine some flour and water and then let it ferment. It usually takes somewhere between three days and a week to be strong enough to leaven bread, which might happen naturally if you just leave it alone, but most methods I read about before I created Ezekiel suggested that you feed your proto-starter approximately every twenty-four hours. That said, my starters all seem to “die” after a couple of days, and I’ve only gotten them to dough-leavening strength by leaving them alone for a little while. So the whole process, which I learned here, goes something like this:

Day 1: Combine 1 cup flour and 1 cup water in a plastic or glass container and cover loosely (cloth or plastic wrap with 2-3 holes punched in it)

Day 2: Stir well, discard* half of the mixture, add ½ cup flour and ½ cup water, stir and cover

Day 3: Stir well, discard half of the mixture, add ½ cup flour and ½ cup water, stir and cover

Days 4-10: If it's beginning to bubble and smell yeasty, continue the routine for days 2 & 3 until it will rise a small amount of test dough.

If it isn't bubbling and instead just separating into liquid and paste, stop feeding it and just leave it alone for 3-4 days; eventually, you should begin to see bubbles forming in the bottom of the paste mixture. At that point, without stirring it, pour off all but ~1/4 cup—you want to get rid of the liquid on top which will probably be greyish or brown, and the paste closest to it, but keep a few tablespoons of the clean, bubbly stuff at the bottom. Then, add 1 cup flour and 1 cup water, stir and cover. Then return to the routine for days 2-4 until it reliably gets frothy after feedings and will rise a small amount of test dough.

*I’ll post recipes for the “discard” in another entry.

What to look for:shortly after refreshing, getting all bubbly

A starter that's ready to bake with will become frothy on top after feeding, sometimes bubbling instantly and definitely within 8 hrs. It will stay frothy until about 18 hrs after a feeding, when the bubbles may subside as it separates into a thick layer of flour-water paste underneath a layer of clear or yellowish liquid (a combination of water, ethanol, and lactic acid called hooch).

To test a starter for rising power, combine 1 tsp. starter with 2 T. flour, a pinch of sugar, and enough water to make a little ball of dough. Cover that and let it sit—you can put it on parchment or wax paper and mark its dimensions if you're not sure you'll be able to tell whether or not it has grown. Within 4-8 hrs, your little ball should double in size. If it can do that, it's ready to make bread.


Starters are resilient—the yeast tend to beat out other competitors because most bacteria aren't very good at digesting starches and the acid and alcohol create an inhospitable environment. However, if your starter ever grows pink, purple, or dark brown things, throw it out and start over (the smell will also turn from pleasantly yeasty and beerish to rancid and foul).

If you leave it too long between feedings and aren't sure if it's alive, try pouring most of it out, leaving just a few tablespoons and feeding it with a whole new batch of flour and water (1 cup each).

at home in the refrigerator


If you keep it at room temperature, you'll have to feed it almost every day, so I choose to keep it in the refrigerator. You can even freeze a starter for up to 3 months, or pour it onto parchment paper, let it air dry, and then crumble it into powder, which is a good method if you want to mail starter to someone, or if you're moving and won't have reliable refrigeration for a while. Once thawed or reconstituted in some water, a frozen/dried starter should work just like it did before.

Refreshing and maintaining:measuring out refreshed starter for baking

Basically all sourdough recipes call for “refreshed” starter, which means the yeast are good and active—to refresh, I usually pour my starter into a glass bowl, add 1 cup water and 1 cup flour, cover it with plastic wrap and let it sit overnight or for 6-8 hrs. When I'm ready to make the dough, I measure out as much starter as I need into a liquid measuring cup, add ½ cup water and ½ cup flour to what remains in the bowl, mix well, and then pour it all back into the quart-size canning jar I store the “mother” in (which I cover with plastic wrap secured with the canning jar ring, poke 2-3 holes in the plastic, and return to the refrigerator). For me, it works best if I'm using 2 cups of starter to bake with, because I'm basically adding 1 ½ cups water and 1 ½ cups flour to the starter every week, which creates about 2 new cups of starter

The more often you use it/feed it, the quicker your rising time will be. If you don't feed it at least once every 2-3 weeks, it may produce too much ethanol or lactic acid and/or start to run out of food, and get sluggish or die. If you don't have time to bake, you can just stir it well, pour half of it off, and feed it with ½ cup flour and ½ cup water to keep it going in the meanwhile. Again, I’ll post recipes soon for what to do with the “discard” if you don't want to throw it out.

If I need ½ cup or less for something, instead of refreshing the whole jar, I'll usually just stir the starter well and measure out half as much starter as I need. Then I feed both the jar and the small portion I've poured out—e.g. if I need 1/2 cup starter, I'll take the jar out of the refrigerator and and mix it well, and then measure ¼ cup into a bowl. I'll add ¼ c. flour and ¼ c. water to the jar, mix well, and return it to the refrigerator. Then, I'll add ¼ c. flour and ¼ cup water to the starter in the bowl (to refresh it), cover it with plastic wrap and let it sit at room temperature for 6-8 hrs. There will be a little extra, but I'll either put that in the dough anyway or just throw it out, or make a tiny griddle cake with the leftover.

Using starter in other recipes:

These instructions produce a 100% hydration starter—meaning it has equal parts flour and water. A 50% hydration starter would have twice as much flour as water, and be more like a dough than a batter. Most recipes I've come across call for 100% hydration starters, but if you're handy with a calculator you can adjust the flour/water ratios in recipes for other % hydration starters as necessary.

To substitute for 1 package of yeast, you need to use about 1 cup of 100% hydration starter. 1 cup of starter = ¾ cup flour and ¾ cup liquid. So, for a typical 1 or 2 loaf yeast bread recipe, you would use 1 cup of starter and subtract ¾ cup flour and ¾ cup liquid. Unless your starter is very active, you should also assume it will take about twice as long as packaged yeast to rise. For chemically-leavened breads (quick breads like muffins, biscuits, sweet breads, cookies, etc.), you can use 1 cup of your starter to replace ¾ cup flour and ¾ cup liquid.

Choosing flour:

Use whatever flour you want to bake with. As far as I know, any kind will work, but wheat and rye are by far the most common. Starters will develop the kind of yeast that works best for the flour they're fed and the temperature of your kitchen. However, you can convert any starter to another kind of flour by feeding it with the new kind of flour for about a week. Also, a starter made with any kind of flour can be used to raise bread made with other kinds of flour. I feed my starter with high-gluten white flour (regular “bread flour”) but often add whole wheat flour for flavor and fiber. You can always use rye, whole wheat, spelt, corn, oat, garbanzo or other flours for part or all of the flour in most bread recipes. Low or gluten-free flours may not perform as well for some breads—especially ones that rely on gluten for their light, airy textures (crusty boules, baguette, ciabatta).

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"...but that nonetheless can live for centuries in the right conditions—something between Rose Nyland’s pet cow and octogenarian Penn State football coach Joe Paterno." = 100% pure Colombian awesome.

Honestly, I would like to try to make some home-made bread. I'm tired of eating the crappy $0.78 loaves of wheat bread from Food 4 Less. I'm just a little leery of doing it.....

there is a middle-ground...

between Food 4 Less and maintaining a sourdough starter.

I used to use this recipe a lot, halved and split into 2 loaves:

it's just your basic wheat sandwich bread--soft and slightly sweet, nice even crumb, good balance of wheat and white flour. clear instructions. takes time, but most of that time doesn't involve actually doing anything.

Thanks for the reply. I may

Thanks for the reply. I may try this ^^ tomorrow (Sunday) even though I bought a cheapie loaf today. I did get a sourdough starter mixed today and will see if I can get it to "live". I'm declining to name it at this point.... I sent you an email on another subject. Perhaps it's something you could try and post about the results. It seems a little "advanced" for me (right now). I'll let you know how things go. Thx, D.

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Like most good things the

Like most good things the mother wanted to share the starter with her friends. Along with the starter went the anecdote of her daughter's naming the sponge. As friends gave this starter to other people, they also received the story of the little girl. To this day "Hermans" seem to pop up among sourdough aficionados everywhere, all due to a little girl and her need for everything to have a name. " Agen P0ker
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Bread at its most broadly

Bread at its most broadly defined is some combination of powdered grains or legumes and moisture, usually water, heated (Harold McGee offers a much better explanation of what actually happens to the proteins and starch and gas cells in the dough if you’re into that sort of thing).
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Amish friendship bread converted to sourdough starter

I'm online looking for how to convert the Amish friendship bread starter that I have into a regular sourdough starter. You mention in this article that you did this, but you don't tell how. Would it be possible to post on the site how one can accomplish this?

feed it with flour and water

It's the same process as converting any starter to any new diet: feed it with the flour you want to use. I use equal amounts flour & water and usually aim to double the starter with each feeding. After a half dozen or so feedings, it should be ready to use.

So for example, if you have 1 cup of friendship bread starter, you would feed it with 1/2 cup flour and 1/2 cup water. 24 hrs later, discard or use half of it and add another 1/2 cup flour and 1/2 cup water. Repeat for another 5-6 days. By the end of the week, whatever milk and sugar remain from the original Amish friendship starter will be negligible and you should be able to use the starter in recipes that call for sourdough starter.

Sourdough discard recipes?


I just came across this post in researching all things sourdough. I would love to know what I can do with the starter discards. Did you ever do a post with recipes? If so, can you give me a link to it? If not, would you be willing to do one?

Thanks again for this post. It's very helpful :)

I never did get around to that

The easiest thing to do is add an egg and enough flour to make the a thick batter and make pancakes. You can also use it in place of the flour & water in any bread recipe.

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starter percentages

Thank you for an excellent article on starters! I plan to try your sourdough monkey bread recipe tomorrow. :)

One thing I thought I might share is that 100% hydration starters generally refer to equal amounts of flour and water by weight. I measure in grams, personally. Because water is heavier than flour, mixing an equal volume of flour and water will result in a much wetter starter -about 166% hydration. Admittedly, that's pretty nit-picky stuff and it wouldn't be a big deal in most recipes unless they call for a large volume (like 1-2 cups) of starter, in which case the wetter starter could make a difference. Otherwise, I just add a little water or flour until the consistency feels right and it shouldn't matter much. I do like to check the hydration of starter called for since it does help keep my results consistent. If you ever need to convert a recipe to a different hydration starter, I found this calculator is really helpful:

Thank you again for sharing your fantastic recipes and adventures with sourdough!

handy, thanks!

I had seen conflicting things on whether hydration referred to volume or weight, so this is useful. I'll stop referring to it as 100% hydration and instead just note that it's 1:1 flour: water by volume. Most people who measure by weight can probably figure out the appropriate conversions.

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Like most good things the mother wanted to share the starter with her friends. Along with the starter went the anecdote of her daughter's naming the sponge. google sniper 3.0

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