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Dessert

Marrow Jam

A sweet preserve made from diced marrow, sugar, lemon, and ginger, boiled and bottled.

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 ↓

Marrow Jam

Ingredients

Directions

Prepare

  1. Cut the marrow into small dice.

  2. Cover the diced marrow with sugar.

  3. Slice the lemons and add them to the marrow.

  4. Let it stand overnight.

Cook and bottle

  1. The next day, boil the mixture for 2 hours with bruised ginger tied in cheesecloth.

  2. Once done, remove the ginger and bottle the jam for use.

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

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

  3. 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

Marrow
Forms the body of the jam, providing the bulk and richness that the sugar and fruit flavour.
Sugar
Sweetens and preserves the jam, drawing moisture out of the marrow so it can thicken as it cooks.
Lemons
Add acidity that balances the sweetness and brightens the flavour, and their pectin helps the jam set.
Ginger
Adds a warm, aromatic spice that flavours the jam; it is removed before bottling.

The step that matters

Boiling the mixture for 2 hours. Long boiling concentrates the sugar and reduces the liquid, which thickens the jam. Too little boiling leaves it runny and prone to spoiling, while too much or uneven heat can scorch the sugar and darken the flavour.

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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