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Bread

Yeast Ferment for Bread

A potato-based yeast ferment used to make bread.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Potato and flour are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 5,355 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Yeast Ferment for Bread

Ingredients

Directions

Prepare the potatoes

  1. Boil or steam the potatoes until tender.

  2. Mash the potatoes and pass them through a colander.

Make the ferment

  1. Mix the flour with enough cold water to achieve a thick cream consistency.

  2. Combine the potato mixture with the flour mixture when warm, about the temperature of new milk.

  3. Stir in the Patent Yeast thoroughly.

  4. Let the mixture work for 12 hours until ready to make sponge for bread.

  5. Prepare the sponge for the oven immediately after the yeast has worked to prevent acidity.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

  1. Potato + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together5,355 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Potatoes
Add moisture and starch that feeds the yeast during fermentation.
Flour
Provides the starch and proteins that form the bread's structure.
Patent yeast
Ferments the mixture, producing gas that makes the dough rise.

The step that matters

Prepare the sponge right after the yeast has worked. If the ferment is left too long, yeast and bacteria keep producing acids. Excess acid sours the flavor and weakens the dough's structure, so the sponge should go into the oven as soon as fermentation peaks.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

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