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 ↓
Butter Tarts
Ingredients
Directions
Make the filling
Cream the butter and sugar together until well combined.
Add the beaten eggs, currants or raisins, and lemon juice or vanilla; mix well.
Bake
Line tart pans with pastry, fill with the mixture, and bake in a moderate oven.
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 + curranttop 17% of all pairsSmell alikemoderateCooked together7,856 recipes
Shared aroma: isoamyl acetate (banana, pear).
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Butter + eggtop 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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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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
- Sugar
- Sweetens the filling and helps create a smooth, glossy texture when creamed with butter.
- Butter
- Adds richness and fat that gives the filling a tender, creamy texture.
- Eggs
- Bind the filling and set during baking to give the tarts a custard-like body.
- Currants or seedless raisins
- Add chewy texture and concentrated sweetness throughout the filling.
The step that matters
Creaming the butter and sugar until well combined. Beating sugar into butter traps air and dissolves sugar grains, producing a smooth, evenly textured filling. Under-creamed butter leaves gritty or dense filling.
Swap the currant
How well each one fits the dish's main ingredients (sugar, butter, egg, lemon):
- Vanillafits better
- Orangefits better
- Raspberryfits better
- Currantthe original
Fit is the average pairing score against sugar, butter, egg, lemon. 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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