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Vegetable Marrow Jam

A jam made by preserving marrow with sugar, ginger, lemon peel, and juice.

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 ↓

Vegetable Marrow Jam

Ingredients

Directions

Prepare

  1. Cut the marrow into strips and remove the pulp and seeds.

  2. Weigh the marrow and add 1 pound of sugar for each pound of marrow.

  3. Lay the marrow and sugar in a pan overnight.

Cook

  1. Add ginger and lemon peel and juice to the preserving pan.

  2. Boil gently for 4 hours, ensuring it does not boil fast to prevent crystallization.

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

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

  3. Sugar + lemontop 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

Marrow
Forms the bulk of the jam and softens into a soft, spreadable texture as it cooks.
Lump sugar
Sweetens the jam and, with the fruit, helps it set and keeps it preserved.
Lemons
Add acidity that brightens the flavour and supports setting.
Ginger
Adds a warm, aromatic spice flavour to the jam.

The step that matters

Boil gently for 4 hours. Fast boiling can make the sugar crystallise and scorch the jam, so a gentle simmer keeps the texture smooth and the sugar fully dissolved.

Swap the lemon

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

  1. Lemonthe original
  2. Orangefits about as well
  3. Limefits less well
  4. Vanillafits less well

Fit is the average pairing score against 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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