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Dessert

Green Tomato Jam

A jam made from peeled green tomatoes, lemon juice, sugar, and grated ginger.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Lemon and ginger match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 5,154 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓

Green Tomato Jam

Ingredients

Directions

Prepare

  1. Peel the green tomatoes and chop them.

  2. Juice the lemons and add the juice to the tomatoes.

Cook and jar

  1. Combine the tomatoes, lemon juice, sugar, and grated ginger in a large pot.

  2. Cook over medium heat, stirring frequently, until the mixture thickens.

  3. Pour the jam into sterilized jars 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. Lemon + gingertop 5% of all pairs
    Smell alikestrong
    Cooked together5,154 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

  2. Tomato + gingertop 10% of all pairs
    Smell alikemoderate
    Cooked together1,887 recipes

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

  3. Tomato + lemontop 11% of all pairs
    Smell alikemoderate
    Cooked together4,592 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  4. Sugar + gingertop 17% of all pairs
    Smell alikelow
    Cooked together14,054 recipes

    Shared aroma: 1-penten-3-one (fish, pungent).

  5. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

Sugar and ginger barely smell alike, yet cooks put them together in 14,054 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

Green tomatoes
Provide the bulk of the jam and its tart, fresh flavour base.
Sugar
Sweetens the jam and, with cooking, thickens it into a spreadable set.
Lemons
Add acidity that balances the sweetness and helps the jam set.
Green ginger
Adds a warm, spicy aroma and a bit of bite.

The step that matters

Cook until the mixture thickens. Sugar and fruit pectin set as water evaporates, so stopping too early leaves a runny jam while cooking too long can scorch the sugar and make it stiff.

Swap the tomato

How well each one fits the dish's main ingredients (lemon, sugar, ginger):

  1. Arrowrootfits better
  2. Sweet potatofits better
  3. Broccolifits better
  4. Tomatothe original

Fit is the average pairing score against lemon, sugar, ginger. 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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