Why it works: Milk and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Butter Scotch
Ingredients
Directions
Make the candy
Dissolve the sugar in the sweet milk.
Add the vinegar and butter.
Boil slowly until it becomes brittle when dropped in cold water.
Finish
Pour onto buttered plates.
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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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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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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Sugar + milktop 18% of all pairsSmell alikelowCooked together77,875 recipes
Shared aroma: 2-nonenal (fatty, green).
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Vinegar + buttertop 23% of all pairsSmell alikemoderateCooked together13,513 recipes
Shared aroma: isoamyl acetate (banana, pear).
Sugar and milk barely smell alike, yet cooks put them together in 77,875 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- White sugar
- Forms the candy's sweet base and sets into a brittle texture as the syrup cooks down.
- Sweet milk
- Liquid that dissolves the sugar and adds richness and a creamy flavor.
- Vinegar
- Adds acidity that helps keep the sugar from crystallizing into grainy pieces.
- Butter
- Adds fat for a smoother bite and a rounded, buttery flavor.
The step that matters
Boil until brittle in cold water. The candy's texture depends on how much water has boiled off, which raises the sugar concentration. Stopping too early leaves it sticky, while cooking too long can scorch it and turn it bitter. Test by dropping a little into cold water and checking that it hardens.
“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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