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 ↓
Boiled Custard
Ingredients
Directions
Make the custard
Heat the milk in a tin pail set in boiling water.
Beat the yolks of 4 eggs, 1 egg white, and sugar together until well combined.
Pour the egg mixture into the boiling milk, stirring constantly until it thickens.
Remove from heat and add vanilla or lemon extract.
Cool the custard in a cool place.
Top and serve
Whip the remaining egg white with powdered sugar until stiff.
Place the whipped egg white on top of the custard.
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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Sugar + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
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Milk + eggtop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
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Milk + sugartop 18% of all pairsSmell alikelowCooked together77,875 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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
- Eggs
- Egg yolks thicken the custard as they set with heat, giving it body.
- Milk
- Forms the liquid base of the custard, which thickens as the egg proteins set.
- Sugar
- Sweetens the custard and balances the richness of the egg and milk.
- Egg white
- Whipped with powdered sugar, it forms a stiff, light topping for the custard.
The step that matters
Stirring the egg mixture into the boiling milk. Egg proteins set at a certain heat and can curdle or scramble if the mixture gets too hot or is not stirred constantly. Constant stirring keeps the heat even so the custard thickens smoothly.
“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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