Why it works: Butter and milk 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 ↓
Stuffed Peppers
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the peppers
Cut the tops off the peppers and remove the seeds and membranes.
Slice a small amount from the bottom of each pepper so they can stand upright.
Make the filling
In a saucepan, melt the butter, then stir in the flour and salt.
Add the onion juice and milk to the butter mixture, stirring until thickened.
Mix in the chopped meat and fill the peppers with this mixture.
Bake and serve
Top each filled pepper with buttered crumbs.
Place the peppers in a baking pan and add boiling water to the bottom.
Bake at 350°F (175°C) for 30 minutes.
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 + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 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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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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
- Flour
- Thickens the butter and milk into a smooth, stable sauce that holds the filling together.
- Butter
- Adds richness and fat, carrying flavour and helping the sauce stay smooth.
- Milk
- Forms the liquid base of the thickened sauce, giving the filling moisture and body.
- Cooked veal or chicken
- Provides the main protein and bulk of the filling, which is already cooked and needs only heating through.
- Buttered crumbs
- Form a golden, crisp topping that browns in the oven while the filling stays moist.
The step that matters
Thickening the butter, flour and milk. Flour must be cooked briefly in melted butter and then stirred into the milk until smooth and thickened; if lumps form or the sauce is undercooked, the filling will be pasty and uneven.
Swap the onion
How well each one fits the dish's main ingredients (pepper, butter, milk, flour, veal):
- Potatofits better
- Capsicumfits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against pepper, butter, milk, flour, veal. 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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