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
Prepare the base
Grate the yellow rinds of the lemons and oranges onto the sugar.
Squeeze the juice from the lemons and oranges into the mixture.
Cover and let it stand overnight.
Finish and serve
Strain the mixture through a sieve.
Add the champagne and beaten egg whites.
Optionally, freeze the punch before serving.
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.
-
Lemon + orangetop 1% of all pairsSmell alikestrongCooked together10,634 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Orange + champagnetop 13% of all pairsSmell alikemoderateCooked together260 recipes
Shared aroma: ethyl isobutyrate (fruity, ethereal).
-
Lemon + champagnetop 13% of all pairsSmell alikelowCooked together404 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
-
Lemon + sugartop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Lemon + eggtop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
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
- Loaf sugar
- Sweetens the punch and draws out oils and juice from the citrus rinds.
- Egg whites
- Beaten to a froth, they add a light, foamy texture to the punch.
- Champagne
- Provides the sparkling liquid base and a light, bubbly character.
- Lemon juice
- Adds acidity that balances the sweetness of the sugar.
Swap the orange
How well each one fits the dish's main ingredients (lemon, sugar, champagne, egg):
- Orangethe original
- Raspberryfits about as well
- Vanillafits about as well
- Pineapplefits less well
Fit is the average pairing score against lemon, sugar, champagne, 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Orange Syrup47 recipes
Lemon Whey33 recipes
Lemon Wine31 recipes
Orange Water Ice28 recipes