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 for One Person
Ingredients
Directions
Make the custard
Beat the egg yolk and granulated sugar together.
Add the beaten egg white.
Stir into the milk when it reaches boiling point.
Cook in a double boiler until thickened.
When partly cold, add the vanilla.
Top and serve
Reserve the egg white, then beat it with powdered sugar.
Place the beaten egg white on top of the custard when cold.
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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Egg + milktop 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
- Egg yolk
- Its proteins set as they heat, thickening the milk into a custard.
- Sweet milk
- Forms the liquid base that the egg proteins thicken.
- Egg white
- Beaten to a foam, it forms a light, airy topping on the custard.
- Granulated sugar
- Adds sweetness and balances the richness of the yolk and milk.
- Vanilla
- Adds a warm, aromatic flavour to the custard.
The step that matters
Cook in a double boiler until thickened. Egg yolk proteins set gently as they heat, thickening the milk. Direct or high heat can overcook them and make the custard grainy or curdled, so the gentle, indirect heat of a double boiler keeps it smooth.
“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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