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Dessert

Vegetable Marrow Jam

A sweet preserve made from vegetable marrow, sugar, ginger, cayenne, apple juice, and lemon.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Vegetable Marrow Jam

Ingredients

Directions

Prepare

  1. Combine cut vegetable marrow with lump sugar, allowing 1 lb of sugar for every lb of marrow.

  2. Let the mixture stand for 2 days.

Cook

  1. In a pot, combine 1 lb of sugar for every pint of marrow juice, along with the rind and juice of the lemons, ginger, cayenne, and apple juice.

  2. Boil the mixture for 20 minutes.

  3. Add the marrow and continue boiling until the jam is clear.

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. Pepper + lemontop 3% of all pairs
    Smell alikestrong
    Cooked together27,047 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  2. Ginger + lemontop 5% of all pairs
    Smell alikestrong
    Cooked together5,154 recipes

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

  3. Pepper + gingertop 9% of all pairs
    Smell alikestrong
    Cooked together6,800 recipes

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

  4. Ginger + appletop 9% of all pairs
    Smell alikemoderate
    Cooked together1,424 recipes

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

  5. Apple + lemontop 14% of all pairs
    Smell alikemoderate
    Cooked together7,551 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

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

What each ingredient does

Vegetable marrow
Provides the bulk of the jam and releases juice when salted with sugar.
Lump sugar
Draws out moisture and sets the jam through its sweetness and concentration.
Lemons
Add acidity that brightens flavour and supports setting.
Ginger
Adds aromatic warmth to the jam.
Apple juice
Adds liquid and fruity flavour to the syrup.

The step that matters

Boil until the jam is clear. Sugar concentrates as water evaporates, so the jam thickens and sets only after enough boiling. Stopping early leaves it runny and cloudy, and overboiling can scorch the sugar.

Swap the apple

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

  1. Limefits better
  2. Orangefits better
  3. Mangofits better
  4. Applethe original

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