Skip to main content
Main

Tomato Catsup

A preserved tomato sauce made with tomatoes, spices, sugar, and vinegar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
Jump to recipe ↓

Why it works: Clove and allspice 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

  1. Combine tomatoes, salt, black pepper, cloves, allspice, onions, brown sugar, and peach leaves in a large pot.

  2. Boil the mixture for 3 hours.

  3. Rub the mixture through a sieve to remove solids.

  4. Add the ground mustard and vinegar to the strained mixture.

  5. Boil for an additional 10 to 15 minutes.

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

    Shared aroma: estragole (anise, licorice).

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

    Shared aroma: methyleugenol (clove, spice).

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

    Shared aroma: ethyl octanoate (fruity, wine).

  4. Pepper + allspicetop 5% of all pairs
    Smell alikestrong
    Cooked together6,395 recipes

    Shared aroma: estragole (anise, licorice).

  5. Onion + mustardtop 6% of all pairs
    Smell alikestrong
    Cooked together9,259 recipes

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

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

What each ingredient does

Tomatoes
Provide the main body, moisture and bulk of the sauce.
Brown sugar
Adds sweetness and helps balance the acidity of the tomatoes and vinegar.
Vinegar
Adds acidity that gives the ketchup its tang and helps preserve it.
Onions
Add savory depth and body to the cooked tomato mixture.

The step that matters

Rubbing the mixture through a sieve. Pressing the cooked solids through a sieve removes skins and seeds, giving the ketchup a smooth, even texture. Skipping or rushing this leaves a coarse, uneven sauce.

Swap the onion

How well each one fits the dish's main ingredients (tomato, pepper, clove, allspice, sugar, peach, mustard):

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

Fit is the average pairing score against tomato, pepper, clove, allspice, sugar, peach, mustard. 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