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Potato Yeast

A potato-based yeast starter made by boiling, mashing, thinning, cooling, adding yeast, and letting rise.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Potato Yeast

Why it works: Flour and sugar are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. The science ↓

Potato Yeast

Ingredients

Directions

Prepare

  1. Boil the potatoes until soft, then drain and mash them until smooth.

  2. Thin the mixture with cold water to a very thick batter consistency.

  3. Strain through a colander and let cool.

Ferment and store

  1. Add a small cup of yeast and set in a warm place until light.

  2. Store in a covered stone jar.

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. Flour + sugartop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

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

    Shared aroma: isobutyraldehyde (malty, green).

  3. 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
Provide starch that feeds the yeast and gives the starter body.
Flour
Adds starch and structure so the starter thickens into a batter.
Sugar
Gives the yeast a quick food source to speed up fermentation.
Yeast
Ferments the starch and sugars, producing gas that makes the starter light.

The step that matters

Let cool before adding the yeast. Yeast is killed or weakened by high heat, so the mixture must be cool enough that it stays alive and can ferment properly.

Swap the potato

How well each one fits the dish's main ingredients (flour, sugar):

  1. Arrowrootfits better
  2. Beetrootfits better
  3. Sweet potatofits better
  4. Potatothe original

Fit is the average pairing score against flour, sugar. Candidates are from the same food group and used in at least 100 recipes.

“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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