Skip to main content
Main

Tomato Catsup

A tomato-based condiment made by cooking tomatoes with spices, mustard, and vinegar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
Jump to recipe ↓

Why it works: Allspice and clove match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 7,874 recipes. Both carry estragole, which smells anise, licorice. The science ↓

Tomato Catsup

Ingredients

Directions

Prepare the tomatoes

  1. Boil the skinned tomatoes until soft.

  2. Press the tomatoes through a colander.

Make the ketchup

  1. Add the ginger, black pepper, allspice, and cloves.

  2. Boil the mixture slowly for 2 to 3 hours.

  3. After removing from heat, mix the ground mustard with a little of the mixture, then stir it back in.

  4. Add the vinegar and stir well.

  5. 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. Allspice + clovetop 1% of all pairs
    Smell alikestrong
    Cooked together7,874 recipes

    Shared aroma: estragole (anise, licorice).

  2. Ginger + clovetop 1% of all pairs
    Smell alikestrong
    Cooked together6,038 recipes

    Shared aroma: estragole (anise, licorice).

  3. Ginger + allspicetop 1% of all pairs
    Smell alikestrong
    Cooked together2,620 recipes

    Shared aroma: estragole (anise, licorice).

  4. Allspice + mustardtop 2% of all pairs
    Smell alikestrong
    Cooked together1,928 recipes

    Shared aroma: methyleugenol (clove, spice).

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

Ripe tomatoes
Provide the main body, pulp and flavour of the ketchup.
Vinegar
Adds acidity that sharpens flavour and helps preserve the finished ketchup.
Ground mustard
Adds pungent flavour and aroma that balances the sweetness of the tomatoes.
Ground black pepper
Contributes sharp, warm heat and aroma to the seasoning blend.

The step that matters

Boil the mixture slowly for 2 to 3 hours. Long, gentle simmering evaporates water and concentrates the tomato solids, giving the ketchup its thick body and deeper flavour. Boiling too hard can scorch the bottom and burn the sugars and solids.

Swap the tomato

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

  1. Horseradishfits better
  2. Shallotfits better
  3. Radishfits better
  4. Tomatothe original

Fit is the average pairing score against ginger, pepper, allspice, clove, mustard, 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.

More tomato ketchup recipes

Green 26 See all 523 →

You might also like

Tomato SoupTomato Soup526 recipesCream of Tomato SoupCream of Tomato Soup107 recipesTomato BisqueTomato Bisque61 recipesCream Tomato SoupCream Tomato Soup28 recipes