Why it works: Mustard and onion match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 9,259 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Tomato Chutney
Ingredients
Directions
Prepare
Ensure tomatoes are sound and not overripe.
Break them into a preserving pan.
Quarter the apples without peeling or coring.
Add them to the pan.
Chop the onions.
Add them along with all other ingredients except the sugar.
Cook
Add the sugar once the mixture has begun to soften.
Boil the mixture slowly until it becomes a complete pulp that can be easily rubbed through a coarse sieve.
Stir well.
Rest and bottle
Let it sit for a day before bottling.
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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Mustard + oniontop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Ginger + peppertop 9% of all pairsSmell alikestrongCooked together6,800 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
- Tomatoes
- Provide the bulk of the pulp and body that forms the chutney.
- Apples
- Add pectin, which helps the chutney thicken and set as it cooks.
- Onions
- Add savoury depth and body to the pulp.
- Soft moist sugar
- Adds sweetness and helps preserve the chutney while balancing the vinegar's acidity.
- Malt vinegar
- Adds acidity that sharpens flavour and helps preserve the chutney.
The step that matters
Boil slowly until a complete pulp forms. Long, gentle boiling evaporates water and breaks down the fruit and vegetables so they thicken into a spreadable pulp. Cooking too fast can scorch the sugar on the bottom of the pan, while stopping early leaves the chutney watery and unset.
Swap the apple
How well each one fits the dish's main ingredients (tomato, mustard, ginger, onion, pepper, malt, vinegar):
- Limefits better
- Mangofits better
- Cherryfits better
- Applethe original
Fit is the average pairing score against tomato, mustard, ginger, onion, pepper, malt, vinegar. 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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