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Grape Catsup

A sweet and spicy grape-based condiment made by boiling grapes with sugar, vinegar, and spices.

From an old cookbook · modernised transcription
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Why it works: Cinnamon and clove 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

Cook the grapes

  1. Boil grapes in enough water to prevent burning.

  2. Strain through a colander.

Season and bottle

  1. Add spices and boil until it thickens slightly.

  2. Bottle and seal.

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. Cinnamon + clovetop 1% of all pairs
    Smell alikestrong
    Cooked together14,189 recipes

    Shared aroma: ethyl cinnamate (sweet, balsamic).

  2. Clove + allspicetop 1% of all pairs
    Smell alikestrong
    Cooked together7,874 recipes

    Shared aroma: estragole (anise, licorice).

  3. Cinnamon + allspicetop 1% of all pairs
    Smell alikestrong
    Cooked together5,536 recipes

    Shared aroma: estragole (anise, licorice).

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

    Shared aroma: ethyl octanoate (fruity, wine).

  5. Allspice + peppertop 5% of all pairs
    Smell alikestrong
    Cooked together6,395 recipes

    Shared aroma: estragole (anise, licorice).

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

What each ingredient does

Grapes
Provide the fruit base, body and natural pectin that help the ketchup thicken.
Sugar
Sweetens the ketchup and, as it concentrates, helps it thicken and preserves it.
Vinegar
Adds acidity and tang that balance the sweetness and help preserve the ketchup.
Cinnamon
Adds warm spiced aroma that defines the flavour of the ketchup.

The step that matters

Boil until it thickens slightly. As water evaporates, the sugar and fruit solids concentrate and the pectin sets. Stopping too early leaves the ketchup thin, while boiling too long makes it stiff and sticky.

Swap the grape

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

  1. Limefits better
  2. Orangefits better
  3. Lemonfits better
  4. Grapethe original

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