Why it works: Butter and milk 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 ↓
Caramel Filling
Ingredients
Directions
Make the caramel
Combine the light brown sugar, butter, and milk in a saucepan.
Boil the mixture until it forms a soft ball when a little is dropped in cold water.
Finish
Spread the caramel filling while it is still warm.
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.
Photo for illustrative purposes only · Contact us to use it
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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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).
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
- Light brown sugar
- Provides sweetness and the caramel flavour, and its molasses helps set a soft texture.
- Butter
- Adds fat for richness and a smooth, glossy texture.
- Milk
- Supplies liquid and milk solids that brown and build the caramel flavour as it cooks.
The step that matters
Boil to the soft-ball stage. Sugar syrup sets according to its final temperature and water content. Stopping too early leaves a runny filling, while cooking too long makes it hard and grainy once cooled.
“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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