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Grape Catsup

A sweet and spicy grape preserve made by boiling grapes with sugar, vinegar, cloves, cinnamon, pepper, and salt.

From an old cookbook · modernised transcription
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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 ↓

Grape Catsup

Ingredients

Directions

Prepare the grapes

  1. Boil grapes in water until soft.

  2. Pass through a colander to remove skins and seeds.

Make the ketchup

  1. In a pot, combine the grape mixture with sugar, vinegar, cloves, cinnamon, pepper, and salt.

  2. Boil until slightly thickened.

  3. Bottle and seal the catsup.

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. Clove + peppertop 5% of all pairs
    Smell alikestrong
    Cooked together17,451 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

  3. Grape + cinnamontop 9% of all pairs
    Smell alikemoderate
    Cooked together3,164 recipes

    Shared aroma: anethole (sweet, anise).

  4. Cinnamon + peppertop 9% of all pairs
    Smell alikestrong
    Cooked together4,890 recipes

    Shared aroma: methyl cinnamate (strawberry).

  5. Sugar + cinnamontop 10% of all pairs
    Smell alikelow
    Cooked together30,779 recipes

    Shared aroma: guaiacol (smoky, sweet).

Sugar and cinnamon barely smell alike, yet cooks put them together in 30,779 recipes: they 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

Grapes
Provide the main fruit body, pectin, and natural sweetness and acidity for the ketchup.
Sugar
Adds sweetness and, as it dissolves and concentrates, helps thicken the ketchup and preserve it.
Vinegar
Adds acidity that balances the sweetness and helps preserve the ketchup.

The step that matters

Boil until slightly thickened. Sugar and fruit solids concentrate as water evaporates, and the cook must stop at the right point. Too little boiling leaves it thin and watery; too much makes it stiff and candy-like as it cools.

Swap the grape

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

  1. Limefits better
  2. Cherryfits better
  3. Figfits better
  4. Grapethe original

Fit is the average pairing score against sugar, vinegar, clove, cinnamon, pepper. 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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