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Dessert

Coloured Jelly for Trifle

A coloured gelatin dessert used as a layer in trifle, made with rhubarb syrup, lemon zest, gelatine, lemon juice, egg white, and cochineal.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Rhubarb and lemon match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 546 recipes. Both carry acetic acid, which smells sour, vinegar. The science ↓

Coloured Jelly for Trifle

Ingredients

Directions

Make the jelly

  1. Combine rhubarb syrup and lemon zest in a small pan and bring to a boil.

  2. Stir in the gelatine sheets and lemon juice until dissolved.

  3. Strain into a large bowl and let cool without setting.

  4. Once cool, beat the egg white until stiff peaks form and fold it into the mixture.

  5. Whisk for 5 to 10 minutes.

  6. Add cochineal to achieve desired color.

Finish and serve

  1. Pour the jelly over the custard and garnish with ratafias or candied fruits.

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. Rhubarb + lemontop 7% of all pairs
    Smell alikestrong
    Cooked together546 recipes

    Shared aroma: acetic acid (sour, vinegar).

  2. Rhubarb + syruptop 18% of all pairs
    Smell alikemoderate
    Cooked together115 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

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

  4. Syrup + lemontop 20% of all pairs
    Smell alikelow
    Cooked together2,235 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  5. Rhubarb + eggtop 31% of all pairs
    Smell alikelow
    Cooked together570 recipes

    Shared aroma: acetic acid (sour, vinegar).

Lemon and egg barely smell alike, yet cooks put them together in 44,316 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 sheets
Sets the liquid into a wobbly, sliceable jelly as it cools.
Egg white
Whipped to stiff peaks and folded in, it lightens the jelly and gives it a foamy texture.
Rhubarb syrup
Provides the main flavour and liquid base of the jelly.
Lemon juice
Adds acidity that brightens the sweet rhubarb flavour.

The step that matters

Let the mixture cool without setting before folding in the egg white. If the gelatine mixture is still hot, it will melt or deflate the whipped egg white. If it is already setting, the foam will not fold in evenly. Cooling until just thick enough keeps the foam airy.

Swap the rhubarb

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

  1. Nutmegfits better
  2. Parsleyfits better
  3. Cinnamonfits better
  4. Rhubarbthe original

Fit is the average pairing score against syrup, lemon, 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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