Why it works: Orange and lemon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,634 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓
Orange Tarts
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.
Prepare
Preheat oven to 350°F (175°C).
Make the filling
In a bowl, combine the juice and grated rind of the orange and lemon.
Add the sugar, butter, and egg yolks to the mixture and mix well.
In a separate bowl, beat the egg whites until stiff peaks form.
Gently fold the egg whites into the orange mixture.
Bake
Pour the filling into tart shells and 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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Orange + lemontop 1% of all pairsSmell alikestrongCooked together10,634 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Lemon + buttertop 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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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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Lemon + sugartop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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
- Yolks enrich and thicken the filling, while whites beaten to stiff peaks lighten its texture.
- Sugar
- Sweetens the filling and balances the sharp citrus acidity.
- Butter
- Adds fat for a rich, smooth texture in the filling.
- Orange and lemon juice
- Provides the main citrus flavour and acidity, and helps the filling set.
The step that matters
Folding the egg whites into the orange mixture. Whipped egg whites trap air that gives lightness. Folding gently keeps that air in; stirring vigorously knocks it out, leaving a denser, flatter tart.
Swap the orange
How well each one fits the dish's main ingredients (lemon, sugar, butter, egg):
- Vanillafits about as well
- Orangethe original
- Raspberryfits about as well
- Figfits about as well
Fit is the average pairing score against lemon, sugar, butter, 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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