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
Salt the tomatoes
Slice the tomatoes and sprinkle with salt.
Let sit overnight.
Drain the tomatoes well.
Cook the sauce
Combine the tomatoes, onions, red peppers, horseradish, cayenne, 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.
-
Horseradish + mustardtop 1% of all pairsSmell alikestrongCooked together1,832 recipes
Shared aroma: coumarin (sweet, hay).
-
Onion + mustardtop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + horseradishtop 7% of all pairsSmell alikestrongCooked together1,784 recipes
Shared aroma: coumarin (sweet, hay).
-
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 provide its tart, fresh base.
- Onions
- Add savory sweetness and body as they soften during simmering.
- Red peppers
- Add sweetness and color, softening into the sauce as it cooks.
- Horseradish
- Supplies sharp pungency, which mellows somewhat with long cooking.
- Sugar
- Balances the tartness of the green tomatoes.
- Cayenne pepper
- Adds a lingering background heat.
The step that matters
Drain the salted tomatoes well. Salt draws water out of the tomatoes overnight. If they are not drained thoroughly, the excess liquid goes into the pot, thinning the sauce and diluting 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Mixed Mustard9 recipes
Horseradish Cream Sauce6 recipes
Wine Sauce (for stewed fruit)186 recipes
Caper Sauce180 recipes