Why it works: Walnut and butter are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 6,832 recipes. Both carry eucalyptol, which smells eucalyptus, herbal. The science ↓
Butter Scotch
Ingredients
Directions
Combine brown sugar, water, vinegar, and butter in a saucepan.
Boil for 20 minutes, stirring occasionally.
Flavor as desired before serving.
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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Walnut + buttertop 15% of all pairsSmell alikemoderateCooked together6,832 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Sugar + vinegartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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Vinegar + walnuttop 22% of all pairsSmell alikemoderateCooked together1,769 recipes
Shared aroma: sotolon (curry, maple).
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Vinegar + buttertop 23% of all pairsSmell alikemoderateCooked together13,513 recipes
Shared aroma: isoamyl acetate (banana, pear).
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, as it cooks down, the hard, brittle set of the candy.
- Vinegar
- Adds acidity that helps keep the sugar from turning grainy as it cooks.
- Butter
- Adds fat for richness and a smoother, softer mouthfeel.
The step that matters
Boil for 20 minutes, stirring occasionally. Cooking drives off water and concentrates the sugar, so the candy's final firmness depends on how long it boils. Stirring helps even heat distribution and prevents scorching on the pan bottom.
Swap the walnut
How well each one fits the dish's main ingredients (sugar, vinegar, butter):
- Almondfits better
- Sesamefits better
- Soybeanfits about as well
- Walnutthe original
Fit is the average pairing score against sugar, vinegar, butter. 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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