Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Vinegar Pie
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 together sugar, egg yolks, flour, butter, and a little water in a bowl.
Boil 1 cup of water with 3 tablespoons of vinegar in a saucepan.
Add the creamed mixture and 1 teaspoon of lemon juice to the boiling water, then pour the filling into a pre-baked pie crust.
Top and bake
Beat the egg whites until stiff and spread over the filling.
Brown the pie in a 350°F (175°C) 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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Sugar + vinegartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
Flour and butter barely smell alike, yet cooks put them together in 124,287 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 filling and add richness as they set with the heat.
- Flour
- Thickens the creamy filling so it holds its shape when cut.
- Butter
- Adds fat for a smooth, rich texture in the filling.
- Vinegar
- Adds sharp acidity that balances the sweetness of the sugar.
- Egg whites
- Whipped into a stiff topping that browns in the oven.
The step that matters
Adding the creamed mixture to the boiling water. Flour-thickened fillings need to be stirred while they heat so the starch swells evenly and does not clump or stay raw-tasting. Adding the mixture to a rapidly boiling liquid can also cause lumps, so the filling should be whisked as it thickens.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg, flour, butter, vinegar):
- Raisinfits better
- Vanillafits better
- Figfits about as well
- Lemonthe original
Fit is the average pairing score against sugar, egg, flour, butter, vinegar. 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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