Why it works: Pepper and tomato match in chemistry and in kitchens. They rank in the top 4% of all ingredient pairs, and 17,913 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
The recipe
Ingredients
Contains: soy (auto-detected from the ingredients and method; we can miss things, so check labels)
Also mentioned in the method: soy
Directions
Salt the tomatoes
Take 1 peck yellow tomatoes or small round red ones, prick each with a fork, put in a jar in layers with salt between. Let remain 8 days.
Drain off.
Add the spices and onions
Add 12 large white onions sliced, 2 ounces each of ground cloves and allspice, 1 ounce pepper, 1 bottle good mustard.
Put a layer of spices and onions between 2 layers of tomatoes.
Scald the vinegar and pour over cold.
Make the sauce
Peel and chop 4 quarts ripe tomatoes, chop 1 cup red peppers, 1 cup onions peeled and chopped.
Add 1 cup each of sugar and salt.
Add 1 pint vinegar, 1 teaspoon cloves and cinnamon, 1 teaspoon ginger, and 1 grated nutmeg.
Boil 3 hours.
Strain or not.
Bottle and seal hot.
Cook the second batch
Chop 1 peck ripe tomatoes and 8 large onions finely.
Add 1 cup sugar, 1 cup vinegar, a little salt, a little red pepper, 1 tablespoon mixed spices tied in a muslin bag.
Boil until as thick as you want it.
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. See the original page.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.
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Pepper + tomatotop 4% of all pairsAroma overlapstrongMentioned together17,913 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Clove + peppertop 3% of all pairsAroma overlapstrongMentioned together13,144 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Vinegar + mustardtop 4% of all pairsAroma overlaplowMentioned together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Tomato + oniontop 4% of all pairsAroma overlapstrongMentioned together20,622 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + mustardtop 4% of all pairsAroma overlapstrongMentioned together9,243 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Vinegar and mustard share little aroma chemistry, yet 14,067 recipes mention both: they likely 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
- Yellow tomatoes
- Salted and drained, they give the base of the pickle its bulk and flesh.
- White onions
- Layered with spices, they add sweetness and soften as the pickle matures.
- Sugar
- Balances the sharpness of the vinegar and adds sweetness to the sauce.
- Vinegar
- Adds acidity that preserves the pickle and sharpens its flavour.
- Ripe tomatoes
- Break down during boiling to form the body of the thick sauce.
The step that matters
Boil until as thick as you want it. Long simmering evaporates water and concentrates sugar and acid, which sets the texture and helps the pickle keep. Stopping early leaves a thin, less stable sauce.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (clove, pepper, tomato, sugar, vinegar, mustard, tea):
- Capsicumbetter flavor fit
- Cucumberbetter flavor fit
- Lettucebetter flavor fit
- Onionthe original
Fit is the average pairing score against clove, pepper, tomato, sugar, vinegar, mustard, tea. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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