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Drink

Grape Fruit Ice

A chilled beverage made from grapefruit, lemon juice, sugar, and water, served with maraschino cherries.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 ↓

Grape Fruit Ice

Ingredients

Directions

Make the syrup

  1. Squeeze the juice from the lemons.

  2. Combine the sugar, grapefruit rind, and 1 pint of water in a pot.

  3. Bring the mixture to a boil for 5 minutes.

  4. Let the mixture cool.

Freeze and serve

  1. Add the remaining water and the fruit juices.

  2. Pour the mixture into a freezer.

  3. When it starts to freeze, add the shredded grapefruit.

  4. Serve in glass cups.

  5. Garnish with maraschino cherries.

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

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

  3. Grapefruit + sugartop 26% of all pairs
    Smell alikelow
    Cooked together309 recipes

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

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

Sugar
Sweetens the ice and lowers the freezing point so it stays softer.
Grapefruits
Provide the main flavor, juice, and shredded pulp for texture.
Lemons
Add acidity that brightens the flavor and balances the sweetness.

The step that matters

When it starts to freeze, add the shredded grapefruit. Adding the fruit once ice crystals begin to form keeps the pulp distributed rather than sinking or freezing into a solid mass. Sugar and acid in the base also affect how firmly it sets.

Swap the grapefruit

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

  1. Orangefits better
  2. Limefits better
  3. Vanillafits about as well
  4. Grapefruitthe original

Fit is the average pairing score against sugar, 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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