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Dessert

Calf-foot Jelly

A gelatinous dessert made by boiling calf foot with sugar, lemon, cinnamon, and eggs.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Lemon and cinnamon match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 7,950 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓

Calf-foot Jelly

Ingredients

Directions

Prepare the stock

  1. If using a knap bone, break it up.

  2. Place the knap bone in a pan covered with water.

  3. Boil for 8 to 10 hours.

  4. Strain the liquid.

  5. Let it cool.

  6. Skim off the fat.

  7. Wipe the jelly with a cloth wrung out of warm water.

Make the jelly

  1. Break the jelly into a jelly pan.

  2. Add the lemon rind, juice, sugar, cinnamon, and eggs (including shells).

  3. Slowly bring to a boil while stirring for about 30 minutes.

  4. Boil for 5 minutes without stirring.

  5. Let it stand for 5 minutes.

  6. Strain through a jelly bag.

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 + cinnamontop 7% of all pairs
    Smell alikestrong
    Cooked together7,950 recipes

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

  2. Sugar + cinnamontop 10% of all pairs
    Smell alikelow
    Cooked together30,779 recipes

    Shared aroma: guaiacol (smoky, sweet).

  3. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

  4. Lemon + eggtop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

  5. Sugar + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

Sugar and cinnamon barely smell alike, yet cooks put them together in 30,779 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

Ox foot or knap bone
Releases gelatin into the water during long boiling, which sets the jelly.
Fresh eggs
Egg whites cloud and collect impurities as they set, clarifying the jelly.
Lemon juice
Adds acidity that balances the sweetness and brightens the flavour.
Demerara sugar
Adds sweetness and helps give the jelly its body and flavour.

The step that matters

Skim off the fat. Fat left on the cooled stock stays in the jelly and makes it greasy and cloudy, so it must be removed before the clarifying step.

Swap the lemon

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

  1. Vanillafits better
  2. Raisinfits better
  3. Figfits about as well
  4. Lemonthe original

Fit is the average pairing score against sugar, cinnamon, egg. 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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