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Dessert

Swedish Sponge Cake

A light cake made with eggs, sugar, potato flour, lemon extract, and leavening agents.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Sugar and cream are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 43,450 recipes. Both carry 2,3-butanedione, which smells butter, sweet. The science ↓

Swedish Sponge Cake

Ingredients

Directions

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare

  1. Preheat the oven to 350°F (175°C).

  2. Separate the egg whites and yolks.

Make the batter

  1. Beat the yolks with the sugar until creamy.

  2. Sift the potato flour with the cream of tartar, baking soda, and salt, then add to the yolk mixture.

  3. Stir in the lemon extract and gently fold in the beaten egg whites.

Bake

  1. Pour the batter into a greased cake pan and bake for about 40 minutes.

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 + creamtop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

  2. Potato + lemontop 12% of all pairs
    Smell alikemoderate
    Cooked together2,230 recipes

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

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

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  4. Potato + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together5,355 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: isobutyraldehyde (malty, green).

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

Eggs
Whipped whites trap air and give the sponge its light, airy structure, while yolks add richness.
Sugar
Sweetens the batter and, beaten with the yolks, helps create a creamy, stable base.
Potato flour
Provides the starch that sets the crumb while staying tender and light in a sponge.
Cream of tartar
Acidifies the egg whites, stabilizing their foam so the batter holds its volume.
Baking soda
Reacts with the acid in the batter to release gas and help the cake rise.

The step that matters

Folding in the egg whites. Folding gently keeps the air trapped in the beaten whites. Stirring or deflating the foam makes the batter dense and reduces the final rise.

Swap the potato

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

  1. Arrowrootfits better
  2. Leekfits better
  3. Spinachfits better
  4. Potatothe original

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