Why it works: Milk and lemon are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 19,053 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Baked Custard Tart
Ingredients
Directions
Make the custard
Combine milk and lemon rind or cinnamon in a saucepan.
Simmer gently until flavored.
Sweeten the milk to taste and let it cool.
Remove the flavoring ingredients.
Add a small pinch of salt to the milk.
Whisk the eggs in a bowl.
Gradually mix the flavored milk into the eggs.
Bake
Pour the mixture into a tart shell.
Bake until set.
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 + lemontop 15% of all pairsSmell alikemoderateCooked together19,053 recipes
Shared aroma: 2-nonenal (fatty, green).
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Lemon + sugartop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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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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Lemon + eggtop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
Lemon and sugar barely smell alike, yet cooks put them together in 53,532 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
- Set the custard into a firm, sliceable filling as they cook.
- Milk
- Forms the liquid base of the custard and gives it a soft, creamy texture.
- Sugar
- Sweetens the custard and adds flavor to the milk.
The step that matters
Bake until set. Egg proteins coagulate as the custard heats, turning the liquid into a solid. Removing it too early leaves a runny centre, while overbaking can make it grainy or cause it to weep.
Swap the lemon
How well each one fits the dish's main ingredients (milk, sugar, egg):
- Vanillafits better
- Figfits about as well
- Raisinfits about as well
- Lemonthe original
Fit is the average pairing score against milk, sugar, egg. 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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