Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓
Sultana Fudge
Ingredients
Directions
Cook the fudge
Melt the butter in a saucepan.
Add the sugar, sweet milk, and molasses, then bring to a boil.
Let it boil for 7 minutes.
Add the grated chocolate and boil for 9 minutes longer.
Finish and serve
Remove from heat, then stir in the vanilla and ground peanuts or walnuts.
Beat the mixture hard, then pour it into buttered tins to cool.
Cut into squares and serve.
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 + vanillatop 5% of all pairsSmell alikemoderateCooked together19,187 recipes
Shared aroma: ethyl caproate (fruity, apple peel).
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Chocolate + vanillatop 5% of all pairsSmell alikemoderateCooked together10,020 recipes
Shared aroma: sotolon (curry, maple).
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Chocolate + peanuttop 6% of all pairsSmell alikemoderateCooked together1,279 recipes
Shared aroma: 2-ethyl-3,6-dimethylpyrazine (roasted, nutty).
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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 + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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
- Butter
- Adds richness and a tender, creamy texture to the fudge.
- Granulated sugar
- Provides sweetness and forms the sugar structure that sets the fudge as it cools.
- Molasses
- Adds depth of flavor, color, and moisture.
- Unsweetened chocolate
- Adds deep chocolate flavor and fat for a smooth, rich body.
- Sweet milk
- Adds moisture and a creamy texture that softens the sugar.
The step that matters
Timing the boil. Boiling evaporates water and concentrates the sugar. Boiling too briefly leaves the fudge soft and sticky, while boiling too long makes it hard and grainy, so the timed boil controls the final texture.
Swap the peanut
How well each one fits the dish's main ingredients (butter, sugar, milk, molasses, chocolate, vanilla):
- Almondfits better
- Cocoafits about as well
- Hazelnutfits about as well
- Peanutthe original
Fit is the average pairing score against butter, sugar, milk, molasses, chocolate, vanilla. 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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