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Drink

Cream Soda

A sweet carbonated beverage made with sugar, tartaric acid, water, lemon juice, egg whites, flour, and checkerberry.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Sugar and flour are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. The science ↓

Cream Soda

Ingredients

Directions

Make the syrup

  1. Boil the sugar, tartaric acid, and water for 5 minutes.

  2. Let the mixture cool nearly to room temperature.

Finish the drink

  1. Beat the egg whites until stiff and fold them into the cooled mixture.

  2. Mix in the flour and checkerberry until well combined.

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. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  2. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Lemon + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  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).

Egg and flour barely smell alike, yet cooks put them together in 106,462 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

White sugar
Provides sweetness and body to the finished drink.
Tartaric acid
Adds a sharp, tart acidity that balances the sweetness.
Lemon juice
Adds brightness and extra acidity to the flavor.
Egg whites
Whipped to stiff foam, they add lightness and a frothy texture.
Flour
Thickens the mixture slightly and adds body.
Checkerberry
Provides the main aromatic, minty flavor.

The step that matters

Fold the egg whites into the cooled mixture. If the syrup is still hot, it can deflate the stiff egg white foam and cook the whites, so the mixture loses its light texture. Cooling it first keeps the foam intact.

Swap the lemon

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

  1. Raisinfits better
  2. Vanillafits better
  3. Lemonthe original
  4. Figfits about as well

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