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A Froth to Set on Cream, Custard, or Trifle

A froth made from damson pulp, egg whites, and sugar, used to top cream, custard, or trifle.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Sugar and lemon are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

A Froth to Set on Cream, Custard, or Trifle

Ingredients

Directions

Make the foam

  1. Sweeten the damson pulp with sugar.

  2. Beat the egg whites until stiff peaks form.

  3. Combine the pulp and egg whites, beating until it holds its shape.

Shape the rock

  1. Spoon the mixture onto the cream, shaping it to resemble a rock.

Make the sugar

  1. In a saucepan, dissolve the sugar in water with lemon juice.

  2. Boil until thick, then test by dipping a spoon into it.

  3. If it snaps when cold, pour the sugar into an oiled copper form in a maze pattern.

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

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

  2. Egg + lemontop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

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

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

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

Sugar and lemon barely smell alike, yet cooks put them together in 53,532 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

Egg whites
Whipped into stiff peaks, they trap air and give the pulp a light, foamy structure.
Damson pulp
Supplies the fruit flavour and body that the whipped whites are folded into.
Sugar
Sweetens the pulp and, when boiled, sets into a brittle decorative form.
Lemon juice
Adds acidity that helps keep the sugar syrup clear and the egg white foam stable.

The step that matters

Testing the boiled sugar. Sugar syrup must boil until thick enough to set hard when cold. Stopping too early leaves it sticky and soft, while boiling too long makes it brittle and prone to browning and bitterness.

Swap the lemon

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

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

Fit is the average pairing score against egg, sugar. 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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