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Roman Punch

A chilled lemon and rum cocktail with whipped egg white.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Roman Punch

Why it works: Sugar and rum are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 2,908 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Roman Punch

Ingredients

Directions

Prepare the base

  1. Juice the lemons and mix the juice with 1 quart of water and sugar to taste.

  2. Freeze the lemon-water mixture.

Add the meringue and rum

  1. Whip the egg white until it forms stiff peaks and mix in sugar.

  2. Combine the whipped egg white with the frozen lemon mixture and add ½ pint of Jamaica rum.

  3. Freeze again until ready to serve.

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.

Photo for illustrative purposes only · Contact us to use it

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 + rumtop 14% of all pairs
    Smell alikelow
    Cooked together2,908 recipes

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

  2. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

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

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

  4. Lemon + rumtop 19% of all pairs
    Smell alikemoderate
    Cooked together1,341 recipes

    Shared aroma: alpha-pinene (pine, turpentine).

  5. Sugar + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

Lemon and sugar 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 white
Whipped to stiff peaks, it adds a light, airy foam that lightens the texture of the ice.
Jamaica rum
Alcohol stays unfrozen, so it keeps the punch softer and adds its own aroma.
Lemons
Their juice supplies the acidity and bright flavour that define the punch.
Sugar
Sweetens the lemon juice and balances its acidity.

The step that matters

Combine the whipped egg white with the frozen lemon mixture. The mixture must be frozen but still spoonable, so the whipped egg white folds in without deflating. If it is frozen solid, the foam cannot blend and the texture turns icy and dense.

Swap the lemon

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

  1. Vanillafits better
  2. Pineapplefits better
  3. Bananafits better
  4. Lemonthe original

Fit is the average pairing score against sugar, egg, rum. 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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