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Dessert

Sour Milk Cookies

Cookies made with butter, sugar, sour milk, flour, eggs, lemon zest and juice, baking soda, and cold water.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Sour Milk Cookies

Ingredients

Directions

The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare the dough

  1. Preheat the oven to 400°F (200°C).

  2. In a bowl, rub together the butter and sugar.

  3. Add the beaten eggs, lemon zest, and lemon juice.

  4. Dissolve the baking soda in cold water and mix it into the sour milk.

  5. Stir the milk mixture into the butter mixture.

  6. Add flour until the dough thickens.

Shape and bake

  1. Roll out the dough and cut into desired shapes.

  2. Bake in the preheated oven until golden.

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. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  2. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Milk + flourtop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  5. Milk + lemontop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

Butter and flour barely smell alike, yet cooks put them together in 124,287 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

Butter
Adds fat that gives the cookies richness and a tender crumb.
Sugar
Sweetens the dough and helps it brown during baking.
Eggs
Add structure and binding so the dough holds together when shaped.
Sour milk
Provides acidity and moisture that react with the baking soda.
Baking soda
Reacts with the sour milk's acidity to produce gas that lightens the dough.
Lemon
Zest and juice add aroma and a bright acidity to the dough.

The step that matters

Dissolving the baking soda in cold water before mixing it into the sour milk. Baking soda needs to be evenly dispersed in the acidic sour milk so it reacts uniformly, giving consistent lift and avoiding pockets of soda that can leave bitter or soapy spots in the cookies.

Swap the lemon

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

  1. Vanillafits better
  2. Raisinfits better
  3. Figfits better
  4. Lemonthe original

Fit is the average pairing score against butter, sugar, milk, flour, 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.

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