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Dessert

Apple Catsup

Apple catsup is a stewed apple condiment made with sugar, spices, onions, salt, and vinegar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Why it works: Clove and cinnamon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 14,189 recipes. Both carry ethyl cinnamate, which smells sweet, balsamic. The science ↓

Apple Catsup

Ingredients

Directions

Make the apple base

  1. Stew the apples in as little water as possible until soft.

  2. Pass the stewed apples through a sieve.

Cook and bottle

  1. In a pot, combine the sifted apples, sugar, pepper, cloves, mustard, cinnamon, onions, salt, and vinegar.

  2. Place over the fire and boil for one hour.

  3. Bottle while hot and seal tightly.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Clove + cinnamontop 1% of all pairs
    Smell alikestrong
    Cooked together14,189 recipes

    Shared aroma: ethyl cinnamate (sweet, balsamic).

  2. Apple + cinnamontop 4% of all pairs
    Smell alikemoderate
    Cooked together5,598 recipes

    Shared aroma: methyl cinnamate (strawberry).

  3. Pepper + clovetop 5% of all pairs
    Smell alikestrong
    Cooked together17,451 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

  4. Mustard + oniontop 6% of all pairs
    Smell alikestrong
    Cooked together9,259 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  5. Apple + clovetop 6% of all pairs
    Smell alikemoderate
    Cooked together2,774 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Apples
Break down into a smooth pulp that forms the body of the ketchup.
Sugar
Adds sweetness and balances the sharpness of the vinegar and apples.
Vinegar
Adds acidity that sharpens flavour and helps preserve the ketchup.
Onions
Contribute savoury depth and body as they cook down into the sauce.

The step that matters

Boil for one hour. A long, steady boil reduces the excess liquid and concentrates the flavours, giving the ketchup a thick texture. Stopping early leaves it thin and watery.

Swap the onion

How well each one fits the dish's main ingredients (apple, sugar, pepper, clove, mustard, cinnamon, vinegar):

  1. Horseradishfits better
  2. Capsicumfits better
  3. Radishfits better
  4. Onionthe original

Fit is the average pairing score against apple, sugar, pepper, clove, mustard, cinnamon, 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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