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Potato Yeast

A yeast starter made by fermenting grated potatoes in boiling water, then adding sugar, salt, and yeast.

From an old cookbook · modernised transcription
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Potato Yeast

Why it works: Potato and sugar are a kitchen classic. They rank in the top 30% of all ingredient pairs, and cooks put them together in 3,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Potato Yeast

Ingredients

Directions

Make the potato mixture

  1. Peel and grate the potatoes quickly to prevent browning.

  2. Pour boiling water over the grated potatoes and cook for 30 minutes.

  3. Add sugar and salt shortly before cooking is done.

Add the yeast and use

  1. Once cool, mix in the yeast and stir well.

  2. The next day, it will be light as foam.

  3. Use 1 teacupful to raise four or five loaves.

  4. Store in a cool place and renew every fortnight in summer.

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.

Photo for illustrative purposes only · Contact us to use it

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 + sugartop 30% of all pairs
    Smell alikelow
    Cooked together3,032 recipes

    Shared aroma: beta-damascenone (apple, rose).

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

What each ingredient does

Potatoes
Starch that breaks down during cooking and feeds the yeast, giving the starter body and food.
Yeast
Live culture that ferments the sugars and produces gas, making the starter foam and leaven bread.
Sugar
Provides readily fermentable sugar that feeds the yeast and speeds up its activity.

The step that matters

Add sugar and salt shortly before cooking is done. Salt slows yeast activity, and sugar is food for it. Adding them near the end of cooking, rather than at the start, keeps the mixture from being overly suppressed while still seasoning it. Timing here affects how well the yeast later works.

“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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