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What is Levain?

Tricia Christensen
Updated May 16, 2024
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Levain is a leavening agent or bread starter, also known as a chef, which is frequently used in place of yeast to rise dough. It’s French in origin, and food historians estimate that it has been in use since the 1600s. It may also be called sourdough, leavening, or wild yeast. The date on this chef is somewhat misleading, since it’s estimated that creating leavening agents like it were the work of the ancient Egyptians, at least 6,000 years ago.

People often prefer the predictability of baker’s yeast to levain, since yeasts can rise bread within a couple of hours. Starters take several days to make, and cooks may have to wait more than two to three hours for bread to rise satisfactorily. Despite the lengthier time involved in using this leavening agent, many artisan bakers prefer it as more natural than baker’s yeast.

To make starter, water and flour are mixed together and allowed to sit out in the open for several days. This exposes the mix to air and encourages the natural growth of fungus and bacteria. The fungus or yeast that grows tends to inhibit the growth of dangerous bacteria, making levain safe to use as a food.

Once the levain is prepared, a process that under the best of circumstances usually takes at least a day, bread dough is mixed with the starter, and the mixed dough will naturally rise. As with bread risen with baker’s yeast, temperature can make a difference in how quickly the bread rises. Dough should be covered and stored in a warm place with no drafts for quickest rising.

Most people who use a chef maintain it, rather than simply remaking it each time they make bread. Once it is mixed into bread dough, a portion of the bread dough is removed, put back in the starter receptacle, and remixed with flour and water to maintain the starter so it is readily available for the next batch of bread. Bakers who’d like to try this starter without going to the trouble of making it should try to find a friend who has already got a starter going who will loan them a cup. They can then easily maintain their own chefs thereafter, by removing a cup of the mixed bread dough and following the steps above.

Some people maintain starters for years, and others gradually grow tired of them and start over. It’s important for cooks to inspect the starter receptacle from time to time. If they note blue or green mold, bad bacteria has clearly taken over and they should start fresh. In most cases, the baker will note that levain has a sour smell, and there may be some condensation. This is natural, since the production of natural fungi produces gases that may condense into liquid form.

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Tricia Christensen
By Tricia Christensen
With a Literature degree from Sonoma State University and years of experience as a DelightedCooking contributor, Tricia Christensen is based in Northern California and brings a wealth of knowledge and passion to her writing. Her wide-ranging interests include reading, writing, medicine, art, film, history, politics, ethics, and religion, all of which she incorporates into her informative articles. Tricia is currently working on her first novel.
Discussion Comments
By whiteplane — On May 11, 2011

@chivebasil - I completely agree with you about the joys of using levain. I have been baking with and giving away starters for years. The fact that you have to use the starter over and over for it to remain fresh means that you always have an incentive to bake bread. I had always been a casual baker but once I started using levain I became a breadsmith in no time.

By chivebasil — On May 08, 2011

I've heard stories of people using the same levain to make bread for months or even years. There are instances when it has been passed across generations like a family heirloom. Traditional baker's yeast feels so sterile and impersonal compared to maintaining a starter. The experience of baking with levain is something everyone should try.

Tricia Christensen
Tricia Christensen
With a Literature degree from Sonoma State University and years of experience as a DelightedCooking contributor, Tricia...
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