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Drink

Roman Punch

A frozen punch made with sugar syrup, citrus, egg whites, and rum or kirschwasser.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Roman Punch

Why it works: Lemon and orange match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,634 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Roman Punch

Ingredients

Directions

Make the syrup

  1. In a saucepan, combine water and sugar, and boil until it forms a syrup.

Make the base

  1. Add the thinly cut rind of 3 lemons and 1 orange, along with the juice of the oranges and lemons, and bring to a boil.

  2. Once cooled, strain the mixture and partially freeze it.

Finish and serve

  1. Stir in the rum or kirschwasser and the stiffly whipped egg whites, then freeze for a few more minutes.

  2. Serve in sorbet cups or glasses while still half-frozen.

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. Lemon + orangetop 1% of all pairs
    Smell alikestrong
    Cooked together10,634 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  2. Orange + rumtop 12% of all pairs
    Smell alikemoderate
    Cooked together801 recipes

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

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

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

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

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

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

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

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 to a stiff foam, they lighten the texture and give the punch a smooth, airy body.
Loaf sugar
Dissolved into a syrup, it sweetens the punch and softens the icy texture.
Lemons
Their juice adds sharp acidity that balances the sweetness and brightens the flavour.
Rum or kirschwasser
Alcohol lowers the freezing point, keeping the punch softer and scoopable rather than rock-hard.

The step that matters

Partially freezing the base. Freezing only until partly set matters because the mixture must stay half-frozen to hold its slushy, airy texture. Freezing it solid makes it hard and icy, and the whipped egg whites must be folded in while the base is still cold but not fully frozen.

Swap the orange

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

  1. Vanillafits better
  2. Orangethe original
  3. Pineapplefits about as well
  4. Limefits less well

Fit is the average pairing score against sugar, lemon, 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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