Why it works: Butter and flour 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 Pies
Ingredients
Directions
Make the filling
In a saucepan, combine vinegar and water with the butter, then heat until boiling.
In a bowl, beat the yolks of the eggs with 1 cup of water and the flour.
Once the vinegar mixture boils, stir in the egg and flour mixture until well cooked.
Bake and finish
Prepare the crust for 4 pies and fill with the vinegar mixture.
Bake the pies until done.
Beat the egg whites with the sugar until frothy, then spread on the baked pies.
Color the froth in the oven before serving.
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 + flourtop 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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Vinegar + sugartop 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).
Butter and flour 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
- Vinegar
- Provides the sharp, acidic tang that defines the pie's flavor.
- Eggs
- Cooked yolks thicken the filling, while whipped whites form the light topping.
- Flour
- Thickens the vinegar mixture so the filling sets into a spoonable custard.
- Butter
- Adds richness and fat, softening the sharp acidity of the filling.
- Sugar
- Sweetens the tart filling and helps the egg white topping become glossy.
The step that matters
Stir the egg and flour mixture into the boiling vinegar mixture. Egg yolks and flour must be cooked fully in the hot liquid; adding them too cold or without enough heat can leave lumps or a runny filling that will not set properly.
Swap the lemon
How well each one fits the dish's main ingredients (vinegar, egg, butter, sugar, flour):
- Raisinfits better
- Vanillafits better
- Figfits about as well
- Lemonthe original
Fit is the average pairing score against vinegar, egg, butter, sugar, flour. 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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