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Dessert

Coffee Jelly

Coffee jelly is a gelatin-based dessert made with milk, eggs, sugar, and strong coffee.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Milk and coffee are a kitchen classic. They rank in the top 10% of all ingredient pairs, and cooks put them together in 2,202 recipes. Both carry 4-heptenal, which smells creamy, biscuit. The science ↓

Coffee Jelly

Ingredients

Directions

Prepare

  1. Soak the gelatine in enough tepid water to cover it.

  2. In a double boiler, heat the milk until just before boiling.

Make the custard

  1. Stir in the beaten eggs and sugar until combined.

  2. Do not let it boil; just scald until it thickens slightly.

  3. Remove from heat and add the dissolved gelatine and strong coffee.

Set and serve

  1. Pour into molds and let cool.

  2. In warm weather, use a little more gelatine for firmness.

  3. Serve with cream and sugar.

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. Milk + coffeetop 10% of all pairs
    Smell alikemoderate
    Cooked together2,202 recipes

    Shared aroma: 4-heptenal (creamy, biscuit).

  2. Sugar + coffeetop 17% of all pairs
    Smell alikelow
    Cooked together4,344 recipes

    Shared aroma: beta-damascenone (apple, rose).

  3. Milk + eggtop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 recipes

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

  4. Milk + sugartop 18% of all pairs
    Smell alikelow
    Cooked together77,875 recipes

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

  5. Egg + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

Milk and sugar barely smell alike, yet cooks put them together in 77,875 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

Gelatine
Sets the liquid into a firm, wobbly jelly as it cools.
Eggs
Thicken the milk mixture gently as it scalds, adding richness and body.
Milk
Forms the creamy base that the eggs thicken and the coffee is added to.
Sugar
Sweetens the custard and balances the bitterness of the strong coffee.
Strong coffee
Provides the main coffee flavour and dark colour of the jelly.

The step that matters

Do not let the custard boil. Once the beaten eggs are stirred into the milk, boiling can curdle them into a grainy texture. Gentle scalding thickens the custard smoothly without overcooking the egg proteins.

“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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