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 ↓
Raw Potato Yeast
Ingredients
Directions
Make the starter base
Mix flour, sugar, and salt to a paste with a little water.
Peel and grate the potatoes into the paste; mix quickly with a silver spoon.
Pour boiling water over the mixture while stirring well.
If the mixture is not thickened, boil in a granite-ware kettle for 1 minute, stirring to prevent sticking.
Strain through a fine colander into an earthen bread bowl and let cool.
Ferment and store
When lukewarm, add the yeast and cover with a napkin.
Keep in a moderately warm place until fermentation ceases, stirring occasionally.
Once fermented, transfer to a clean glass or earthen jar.
Cover closely and store in the cellar or refrigerator, away from ice.
Shake the yeast before using.
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.
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Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Flour + potatotop 15% of all pairsSmell alikemoderateCooked together5,355 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + potatotop 30% of all pairsSmell alikelowCooked 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 mixture body.
- Flour
- Forms the initial paste and adds starch to feed fermentation.
- White sugar
- Provides food for the yeast, driving fermentation and gas production.
- Good, lively yeast
- Starts the fermentation that leavens the finished yeast.
The step that matters
Adding the yeast only when lukewarm. Yeast cells are killed by very hot liquid, so the mixture must have cooled enough before the yeast is added to stay alive and ferment.
Swap the potato
How well each one fits the dish's main ingredients (flour, sugar):
- Arrowrootfits better
- Beetrootfits better
- Sweet potatofits better
- 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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