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What is Old Dough Leavening?

Mary McMahon
Updated May 16, 2024
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Old dough leavening is exactly what it sounds like: a piece of dough held back from a previous batch of bread which is used as a starter for a new batch. There are a number of different kinds of old dough leavening, ranging from sourdough starters which have been in continuous use for decades at some bakeries, to dough left over from a batch of bread made with baker's yeast. Old dough leavening tends to create a loaf which is more complex, with a wider range of flavors, and many people enjoy using it.

In addition to being used for breads, this type of leavening can also be used for other foods, like muffins, yeasted cakes, and so forth. Like other leaveners, it will cause the dough to rise, making it light and fluffy, rather than dense. Because the leaven is older, it tends to have a slightly more acidic, tangy flavor, which will transfer to the baked goods it is used in.

Sourdough is an ancient form of old dough leavening. It is made by setting out a small amount of flour mixed with water and sometimes other ingredients like crushed fruits. This mixture attracts wild yeasts, which vary depending on the region where the starter is made. The baker carefully feeds the starter, encouraging the proliferation of yeasts inside, and then uses it to leaven a batch of bread. He or she can then either make a new starter, or reserve a chunk of dough from this batch of bread to use as leavening.

When old dough leavening is made from breads which use regular baker's yeast, a small piece of dough is simply reserved before the bread is baked, and carefully fed so that the yeasts do not die. Over time, the leavening may attract wild yeasts, fermenting slightly and becoming a unique starter. In other instances, the leavening grows weak when it is used too many times, and it may die.

Old dough leavening can be stored in the fridge for up to two days, slowing the development of the yeasts. It can also be frozen, after being wrapped in wax and then in foil, but it will need to be allowed to sit out at room temperature when bakers want to use it, allowing the yeasts inside to wake up. An old dough leavening is a truly unique leavener, harnessing the specific yeasts of a particular region and creating an individual flavor which will be distinctive. Some of this leavening is famous, and it has been carefully husbanded by its parent bakery for decades, ensuring that customers experience the flavors they are familiar with every time they buy bread.

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Mary McMahon
By Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a DelightedCooking researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Discussion Comments
By Wisedly33 — On Aug 29, 2014

I've never heard of starter lasting that long! Sure, I've heard of sourdough and how they save a bit of the sourdough for the next batch, but I don't suppose I ever made the actual connection of how a starter was actually just the next generation of yeast, and it was connected to the previous starters.

I'd be afraid I'd let my starter die and then I'd have to begin again. But that's just me. I'd be so disappointed if it died on me. I'm sure bakers have to deal with that every day, but I'd still be disappointed.

By Scrbblchick — On Aug 28, 2014

I was watching a TV cooking show and the guest chef was a baker and said they had a starter in her bakery that her grandmother actually brought over from Italy, and there's no telling how many times it had been resurrected before that. She said the starter was probably close to 200 years old! I was amazed.

I don't know how it's possible to keep starter alive that long, but it's truly a unique living legacy in every sense of the word. It's such a gift to have something like that, that so many of her ancestors have used to bake bread. Wow.

Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a...

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