Why it works: Butter and lemon are a kitchen classic. They rank in the top 16% of all ingredient pairs, and cooks put them together in 41,227 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓
Lemon Tartlets
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Make the filling
Cream the butter and sugar together until light and fluffy.
Beat in each egg yolk one at a time.
Add the juice and finely grated rind of the lemons.
Let the mixture stand in a cool, dry place for at least 24 hours.
Bake
Preheat the oven to 350°F (175°C).
Line patty pans with short pastry and fill with the lemon mixture.
Bake until set and lightly golden.
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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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Butter + sugartop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + lemontop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
Sugar and lemon 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
- Butter
- Creams with sugar to trap air and give the filling a rich, tender body.
- Caster sugar
- Creams with butter to build a light structure and adds sweetness.
- Egg yolks
- Emulsify the mixture and set when baked, giving the filling its firm, custard-like texture.
- Lemons
- Juice provides acidity and sharp flavour; grated rind adds aromatic lemon oils.
The step that matters
Baking until just set. Egg yolks set as their proteins coagulate with heat. Overbaking curdles and toughens the filling, while underbaking leaves it runny, so the tartlets should be removed once set and lightly golden.
Swap the lemon
How well each one fits the dish's main ingredients (butter, sugar, egg):
- Vanillafits better
- Lemonthe original
- Raisinfits about as well
- Figfits about as well
Fit is the average pairing score against butter, 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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