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Dessert

Green Tomato Jam

Jam made from green tomatoes, ginger, lemon rinds, and sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Ginger and lemon 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. Slice the tomatoes and add their juice.

  2. Add the thin rinds of the lemons and the ginger.

Make the jam

  1. Boil until tender.

  2. Add the sugar and continue boiling until the mixture reaches the consistency of jam.

  3. Remove the ginger and store the jam in sterilized jars.

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. Ginger + lemontop 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. Ginger + sugartop 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).

Ginger and sugar 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 body as they break down while cooking.
Sugar
Sweetens the jam and, as it boils down, helps it thicken to a jam consistency.
Lemons
Contribute acidity and aroma from their thin rinds, balancing the sweetness.
Green ginger
Adds a warm, aromatic flavour; it is removed before the jam is stored.

The step that matters

Add the sugar and boil to the consistency of jam. Sugar must dissolve fully and the mixture must boil long enough to concentrate and gel. Stopping too early leaves a runny jam, while overcooking can make it stiff and sticky.

Swap the tomato

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

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

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