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 ↓
Yeast
Ingredients
Directions
Prepare the starter
Boil 2 quarts of water with 2 tablespoons of hops.
Grate 6 large potatoes.
Strain the water over the grated potatoes and stir well.
Boil the mixture once, then add ½ cup of sugar and ¼ cup of coarse sea salt.
Ferment and store
Let the mixture cool to blood-warm, then add 1 cup of yeast.
Let it rise in a warm place for 5 to 6 hours.
Transfer to a stone jug, cork tightly, and store in a cool place.
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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Potato + sugartop 30% of all pairsSmell alikelowCooked together3,032 recipes
Shared aroma: beta-damascenone (apple, rose).
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Hops + potatotop 39% of all pairsSmell alikelowCooked together3 recipes
Shared aroma: myrcene (balsamic, herbaceous).
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Hops + sugartop 43% of all pairsSmell alikelowCooked together6 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Provide starch that yeast feeds on, supplying fermentable material for the rise.
- Yeast
- Ferments sugars in the mixture, producing carbon dioxide that makes it rise and gives it leavening power.
- Sugar
- Serves as readily available food for the yeast, speeding up fermentation.
- Hops
- Adds bitter flavour and aroma while helping preserve the starter.
The step that matters
Let the mixture cool to blood-warm before adding the yeast. Yeast is killed by high heat, so adding it to liquid that is still hot can stop fermentation before the rise begins. Cooling to about body temperature lets the yeast stay active and start working.
Swap the potato
How well each one fits the dish's main ingredients (hops, sugar):
- Mustardfits better
- Cucumberfits about as well
- Capsicumfits about as well
- Potatothe original
Fit is the average pairing score against hops, 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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