Why it works: Lemon and cinnamon match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 7,950 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
A Very Rich Custard
Ingredients
Directions
Boil the milk with the lemon peel and cinnamon stick.
Beat the egg yolks well and add them to the milk when it begins to taste of the seasoning.
Sweeten the mixture to your liking.
Pour the mixture into the cream, stirring well.
Cook the custard until it thickens, stirring continuously in one direction. Do not let it boil.
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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Lemon + cinnamontop 7% of all pairsSmell alikestrongCooked together7,950 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Cream + sugartop 9% of all pairsSmell alikemoderateCooked together43,450 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
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Milk + cinnamontop 10% of all pairsSmell alikemoderateCooked together12,655 recipes
Shared aroma: cuminaldehyde (Spicy, cumin).
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Cinnamon + sugartop 10% of all pairsSmell alikelowCooked together30,779 recipes
Shared aroma: guaiacol (smoky, sweet).
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Milk + lemontop 15% of all pairsSmell alikemoderateCooked together19,053 recipes
Shared aroma: 2-nonenal (fatty, green).
Cinnamon and sugar barely smell alike, yet cooks put them together in 30,779 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
- Thicken the custard as they set with gentle heat, giving it body and richness.
- Cream
- Adds fat and richness, giving the custard a smooth, velvety texture.
- Milk
- Forms the liquid base that the yolks thicken and that carries the flavouring.
- Sugar
- Adds sweetness, adjusted to taste.
The step that matters
Cook the custard until it thickens, without boiling. Egg yolks thicken through gentle heat, and if the custard boils they can curdle and turn grainy. Stirring constantly in one direction helps keep the heat even and the texture smooth.
Swap the lemon
How well each one fits the dish's main ingredients (milk, cream, egg, cinnamon, sugar):
- Vanillafits better
- Raisinfits better
- Figfits better
- Lemonthe original
Fit is the average pairing score against milk, cream, egg, cinnamon, sugar. 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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