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 ↓
Walnut Fudge
Ingredients
Directions
Make the fudge
Combine sugar, milk, butter, and grated chocolate in a skillet.
Boil for about 10 minutes, testing in cold water for a soft ball stage.
Remove from heat and stir in chopped walnuts to taste.
Beat the mixture until thick.
Set and cut
Pour the mixture into buttered tins about ½ inch deep.
Cool the mixture.
Cut into squares.
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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Chocolate + walnuttop 10% of all pairsSmell alikemoderateCooked together1,548 recipes
Shared aroma: 3-ethyl-2,5-dimethylpyrazine (roasted, nutty).
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Sugar + chocolatetop 13% of all pairsSmell alikemoderateCooked together15,404 recipes
Shared aroma: guaiacol (smoky, sweet).
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Walnut + meattop 13% of all pairsSmell alikemoderateCooked together1,035 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Milk + chocolatetop 13% of all pairsSmell alikemoderateCooked together9,128 recipes
Shared aroma: gamma-nonanolactone (coconut, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Sugar
- Provides sweetness and, when boiled, forms the firm crystalline body of the fudge.
- Milk
- Adds moisture and dissolves the sugar so the mixture can be boiled smoothly.
- Butter
- Adds fat that gives the fudge a smooth, tender texture.
- Grated chocolate
- Adds chocolate flavour and richness to the fudge.
- Walnut meats
- Add crunch and a nutty flavour that contrasts with the soft fudge.
The step that matters
Beating until thick. Beating after boiling cools the sugar syrup and encourages fine crystals to form, which gives fudge its smooth, creamy texture. Stopping too early or too late changes the set.
Swap the walnut
How well each one fits the dish's main ingredients (sugar, milk, butter, egg, chocolate, meat):
- Pecansfits better
- Almondfits about as well
- Peanutfits about as well
- Walnutthe original
Fit is the average pairing score against sugar, milk, butter, egg, chocolate, meat. 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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