Why it works: Milk and egg are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 88,785 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Boiled Custard
Ingredients
Directions
Make the custard
Sweeten the milk to your taste.
Beat the egg yolks and whites together.
Stir the eggs into the milk.
Cook in a water bath
Fill cups with the mixture.
Place the cups in a pan of boiling water, ensuring the water is halfway up the sides of the cups.
Monitor the water to prevent it from boiling too fast and splashing into the cups.
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 + 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).
Milk and sugar 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
- Milk
- Forms the liquid base of the custard that the eggs set into.
- Egg yolks
- Thicken the custard and add richness and a smooth texture.
- Egg whites
- Add protein that sets during gentle heating, giving the custard body and structure.
- Sugar
- Adds sweetness to balance the eggs and milk.
The step that matters
Monitor the water bath. Egg proteins set with gentle heat. If the water boils hard or splashes into the cups, the custard can overheat, turning grainy or curdled, and may develop holes or an uneven texture.
“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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