Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Beef Steak Pie
Ingredients
Directions
The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.
Make the gravy
Boil the chopped onions in 1 pint of water until tender.
Mix the flour, butter, pepper, salt, and ketchup with the water from the onions.
Add the beef to the mixture and boil for 3 minutes.
Assemble and bake
Line a pie pan with pastry, pour in the meat and gravy.
Cover with a top crust of pastry, making a slit at each end to let out steam.
Bake at 400°F (200°C) until the crust is light brown and 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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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + ketchuptop 13% of all pairsSmell alikemoderateCooked together2,435 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Onion + flourtop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
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
- Beef (in the method)
- Provides the savory meat filling that gives the pie its main body and flavor.
- Onions
- Soften as they cook, adding sweetness and moisture to the gravy.
- Flour
- Thickens the cooking liquid into a gravy that holds the filling together.
- Butter
- Adds richness and fat that rounds out the gravy's flavor.
- Pastry
- Forms the crust that encloses the filling and browns in the oven.
- Ketchup
- Adds sweetness and acidity that deepen the savory gravy flavor.
The step that matters
Mixing the flour into the onion water. Flour clumps if added to hot liquid without being fully blended first. Mixing it smoothly into the liquid lets its starch dissolve and thicken evenly as it heats, giving a smooth gravy rather than lumps.
Swap the onion
How well each one fits the dish's main ingredients (flour, butter, pepper, ketchup):
- Capsicumfits better
- Shallotfits better
- Turnipfits better
- Onionthe original
Fit is the average pairing score against flour, butter, pepper, ketchup. 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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