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Grape Catsup

A sweet and spicy grape-based condiment made with vinegar and brown sugar.

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

Prepare the grapes

  1. Squeeze the pulp from the skins of the grapes.

  2. Scald the pulp until the seeds separate easily.

  3. Work the pulp through a colander and discard the seeds.

Cook the ketchup

  1. Place the pulp and skins in a porcelain kettle with vinegar and brown sugar.

  2. Add cinnamon, cloves, and allspice.

  3. Boil for 1.5 hours, stirring constantly to prevent burning.

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

    Shared aroma: anethole (sweet, anise).

  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 pulp and skins, giving the ketchup its body and flavor.
Vinegar
Adds acidity that sharpens the flavor and balances the sweetness.
Brown sugar
Adds sweetness and depth, and helps thicken the mixture as it cooks down.
Cinnamon
Adds warm, sweet aroma to the ketchup.
Cloves
Adds a strong, warm aroma to the ketchup.
Allspice
Adds a warm, aromatic flavor to the ketchup.

The step that matters

Stir constantly while boiling. The mixture is thick and rich in sugar, so it scorches easily on the bottom of the kettle. Constant stirring spreads the heat evenly and keeps the sugars from burning over the long cook.

Swap the grape

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

  1. Vanillafits better
  2. Orangefits better
  3. Quincefits better
  4. Grapethe original

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