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Dessert

Pineapple and Grapefruit Gelatine

A gelatin dessert made with pineapple, grapefruit, sugar, lemon juice, and gelatin.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Grapefruit and lemon match in chemistry and in kitchens. They rank in the top 4% of all ingredient pairs, and cooks put them together in 184 recipes. Both carry (e,e)-2,4-decadienal, which smells fatty, deep fried. The science ↓

Pineapple and Grapefruit Gelatine

Ingredients

Directions

Make the gelatin

  1. Dissolve gelatin in 1 cup cold water.

  2. Add 1 cup cold water or pineapple juice.

  3. Stir in boiling water, sugar, and lemon juice.

Set and serve

  1. When the mixture is half congealed, add diced grapefruit and pineapple.

  2. Allow to congeal completely, then serve as a dessert or salad with mayonnaise.

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. Grapefruit + lemontop 4% of all pairs
    Smell alikestrong
    Cooked together184 recipes

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

  2. Pineapple + grapefruittop 6% of all pairs
    Smell alikemoderate
    Cooked together95 recipes

    Shared aroma: ethyl isobutyrate (fruity, ethereal).

  3. Pineapple + lemontop 12% of all pairs
    Smell alikemoderate
    Cooked together1,964 recipes

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

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

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

  5. Pineapple + sugartop 19% of all pairs
    Smell alikelow
    Cooked together4,841 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

Gelatine
Forms the gel structure that sets the dish as it cools.
Sugar
Adds sweetness and balances the tartness of the citrus and lemon juice.
Lemon juice
Adds acidity that brightens the flavor and sharpens the sweetness.
Canned pineapple
Adds fruit pieces and flavor, with juice that can be used in the liquid.
Grapefruit
Adds diced fruit pieces and a bitter-tart citrus flavor.

The step that matters

Add the fruit when the mixture is half congealed. If the gelatin is still liquid, the diced fruit sinks and settles unevenly. If it has set fully, the fruit will not distribute through the gel. Partly set gelatin holds the pieces suspended as it finishes setting.

Swap the pineapple

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

  1. Orangefits better
  2. Limefits better
  3. Avocadofits about as well
  4. Pineapplethe original

Fit is the average pairing score against sugar, grapefruit, lemon. 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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