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Dessert

Sour Cream Frosting

A frosting made from sour cream, sugar, and walnut meats, boiled and cooled before spreading.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Why it works: Cream and sugar 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 ↓

Sour Cream Frosting

Ingredients

Directions

  1. Combine sour cream, sugar, and walnut meats in a saucepan.

  2. Boil for seven to eight minutes, stirring constantly to prevent burning.

  3. Let cool slightly before spreading on the cake.

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. Cream + sugartop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

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

  2. Walnut + meattop 13% of all pairs
    Smell alikemoderate
    Cooked together1,035 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  3. Cream + walnuttop 21% of all pairs
    Smell alikelow
    Cooked together1,982 recipes

    Shared aroma: octanal (fat, soap).

  4. Cream + meattop 24% of all pairs
    Smell alikelow
    Cooked together2,248 recipes

    Shared aroma: 1-octen-3-one (mushroom, metallic).

  5. Sugar + walnuttop 26% of all pairs
    Smell alikemoderate
    Cooked together7,147 recipes

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

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Sour cream
Adds tang and moisture, giving the frosting a creamy, soft body.
Sugar
Sweetens the frosting and, as it cooks, helps thicken it into a spreadable texture.
Walnut meats
Add crunch and a toasted, nutty flavor that contrasts with the soft frosting.

The step that matters

Stirring while boiling. Sugar and dairy scorch easily on the bottom of a saucepan; constant stirring keeps heat even and prevents burning, which would make the frosting taste bitter.

Swap the walnut

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

  1. Almondfits better
  2. Chestnutfits about as well
  3. Pistachiofits about as well
  4. Walnutthe original

Fit is the average pairing score against cream, sugar, meat. 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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