Why it works: Milk and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Puff Oubiat
Ingredients
Directions
Make the custard
Beat the yolks of the eggs until light, then mix with milk and salt.
Beat butter and flour together until smooth.
Add the butter‑flour mixture to the egg custard and mix well.
Pour the mixture into a buttered pan.
Puff and set
Fold in the beaten egg whites and a pinch of salt when the mixture begins to thicken.
Carefully transfer the mixture to a serving dish once it is stiff.
Fry the kidney and serve
Finely chop the roasted calf's kidney.
Mix the chopped kidney with the remaining beaten eggs.
Melt 3 ounces of butter in a pan.
Add the kidney and egg mixture to the melted butter.
Fry, adding a piece of butter the size of a nutmeg when halfway done to prevent sticking.
Serve hot.
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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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + parsleytop 12% of all pairsSmell alikemoderateCooked together16,675 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + parsleytop 15% of all pairsSmell alikemoderateCooked together28,563 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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
- Eggs
- Yolks enrich and thicken the custard, while whipped whites add air and lift.
- Milk
- Supplies the liquid that the eggs set into a tender, moist custard.
- Flour
- Thickens the custard by absorbing liquid and giving it body.
- Butter
- Adds richness and flavor, and helps the fried surface brown and resist sticking.
- Calf's kidney
- Provides the savory, meaty body that is set into the egg mixture.
The step that matters
Fold in the beaten egg whites as the mixture thickens. Folding gently keeps the air beaten into the whites, which gives the dish its puffed lift. Deflating them by stirring hard leaves a dense result. Transfer only once the mixture is stiff so it holds its shape.
Swap the parsley
How well each one fits the dish's main ingredients (egg, milk, butter, flour):
- Nutmegfits better
- Cinnamonfits better
- Capersfits about as well
- Parsleythe original
Fit is the average pairing score against egg, milk, butter, 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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