Why it works: Horseradish and mustard match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,832 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Governor’s Sauce
Ingredients
Directions
Prepare the tomatoes
Slice the green tomatoes and sprinkle with 1 cup of salt, then let sit overnight.
In the morning, drain the tomatoes well.
Simmer the sauce
Combine the drained tomatoes, onions, red peppers, grated horseradish, cayenne pepper, black pepper, mustard, and sugar in a pot.
Simmer all ingredients together until cooked through.
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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Horseradish + mustardtop 1% of all pairsSmell alikestrongCooked together1,832 recipes
Shared aroma: coumarin (sweet, hay).
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Onion + mustardtop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + horseradishtop 7% of all pairsSmell alikestrongCooked together1,784 recipes
Shared aroma: coumarin (sweet, hay).
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Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Green tomatoes
- Form the bulk of the sauce and, once salted and drained, give it body and a tart base.
- Onions
- Add savory sweetness and aroma as they soften during simmering.
- Red peppers
- Contribute sweetness, color, and body to the sauce as they cook down.
- Grated horseradish
- Adds sharp pungency that mellows and spreads through the sauce during cooking.
- Sugar
- Balances the sharpness of the tomatoes and horseradish with sweetness.
The step that matters
Drain the salted tomatoes well. Salt draws water out of the tomatoes overnight. If they are not drained thoroughly, the extra liquid thins the sauce and dilutes its flavor during simmering.
Swap the tomato
How well each one fits the dish's main ingredients (onion, pepper, horseradish, mustard, sugar):
- Broccolifits better
- Beetrootfits better
- Chivefits better
- Tomatothe original
Fit is the average pairing score against onion, pepper, horseradish, mustard, sugar. 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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