Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Norman Hash
Ingredients
Directions
Make the onion gravy
Peel and fry the button onions in butter until lightly browned.
Stir in the flour and cook until the mixture is a deep amber shade.
Pour in the red wine and boiling broth or water.
Add salt, pepper, and lemon juice or catsup.
Boil until the onions are tender.
Assemble and serve
Slice the leftover beef into small pieces.
Arrange the sliced beef in a clean saucepan.
Pour the gravy and onions over the beef.
Let it sit to absorb the flavors.
Heat the hash near the fire until thoroughly hot.
Serve immediately.
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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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Onion + beeftop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + beeftop 10% of all pairsSmell alikemoderateCooked together18,971 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Red wine + beeftop 12% of all pairsSmell alikemoderateCooked together1,017 recipes
Shared aroma: gamma-nonanolactone (coconut, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Button onions
- Soften and sweeten as they cook, becoming the main body of the hash.
- Butter
- Adds richness and carries flavor while the onions brown lightly.
- Flour
- Thickens the red wine and broth into a gravy when cooked to amber.
- Red wine
- Adds acidity and depth of flavor to the gravy as it reduces.
- Leftover beef
- Provides the meat and substance that the hot gravy soaks into.
The step that matters
Cooking the flour until deep amber. Cooking flour in fat until it browns develops nutty flavor and color, and undercooked flour leaves a raw, pasty taste in the gravy. Stir constantly so it does not scorch.
Swap the lemon
How well each one fits the dish's main ingredients (onion, butter, flour, red wine, pepper, beef):
- Plumfits better
- Avocadofits about as well
- Grapefits about as well
- Lemonthe original
Fit is the average pairing score against onion, butter, flour, red wine, pepper, beef. 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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