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 ↓
French Custards
Ingredients
Directions
Make the custard
In a saucepan, gently boil the milk with sugar and salt for a few minutes.
Remove from heat and briskly stir in the egg yolks.
Bake and serve
Butter a round deep dish and pour in the custard mixture.
Place the dish in a pan of boiling water, ensuring the water does not touch the custard.
Let it simmer for 1 to 1.5 hours until firm in the middle.
Keep a few live embers on the lid to prevent steam from falling into the custard.
Serve the custard cold, garnished with chopped macaroons or ratafias around the edge.
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.
Photo for illustrative purposes only · Contact us to use it
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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Egg + buttertop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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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).
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
- Egg yolks
- Set the custard as they cook, giving it a firm, smooth, sliceable structure.
- Milk
- Forms the liquid base that the egg yolks set into a creamy custard.
- Sugar
- Sweetens the custard and softens its flavour.
The step that matters
Cooking the custard gently in a water bath. Egg proteins set at moderate heat; if the custard touches the pan's direct heat or the water boils too hard, it can curdle or turn grainy. Keeping the water below the custard's level and simmering gently allows an even, smooth set.
“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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