Why it works: Sugar and vinegar are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 20,806 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓
Butter Scotch
Ingredients
Directions
Cook the mixture
Combine brown sugar, butter, water, and vinegar in a saucepan.
Boil the mixture without stirring until it hardens.
Pour and cool
Pour the hot mixture into buttered tins to cool.
If desired, add peanuts before it cools.
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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Sugar + vinegartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
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Butter + peanuttop 16% of all pairsSmell alikemoderateCooked together1,754 recipes
Shared aroma: trans-2-decenal (waxy, orange).
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Vinegar + peanuttop 16% of all pairsSmell alikemoderateCooked together443 recipes
Shared aroma: acetic acid (sour, vinegar).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 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
- Brown sugar
- Provides the sweetness and molasses flavor, and hardens into the brittle candy structure when boiled.
- Butter
- Adds fat for a richer flavor and a smoother, less grainy bite.
- Vinegar
- Adds acidity that helps keep the sugar from crystallizing, so the candy stays smooth.
The step that matters
Boil without stirring until it hardens. The sugar must reach a high enough concentration to set into a brittle candy. Stirring can trigger sugar crystals to form, leaving the texture grainy instead of smooth and glassy.
Swap the peanut
The recipe marks peanut as optional. How well each one fits the dish's main ingredients (sugar, butter, egg, vinegar):
- Almondfits better
- Pecansfits about as well
- Sesamefits about as well
- Peanutthe original
Fit is the average pairing score against sugar, butter, egg, vinegar. 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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