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 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.
Prepare the dough
Preheat your oven to 350°F (175°C).
In a bowl, cream together the sugars and butter until smooth.
Beat in the egg and sour milk.
Mix in the baking soda and baking powder.
Gradually add flour until the dough is manageable.
Flavor the dough with nutmeg or almond extract.
Shape and bake
Roll out the dough and cut into desired shapes.
Place on a baking sheet and bake for 10-12 minutes.
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.
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Flour + nutmegtop 8% of all pairsSmell alikemoderateCooked together18,623 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Coffee + milktop 10% of all pairsSmell alikemoderateCooked together2,202 recipes
Shared aroma: 4-heptenal (creamy, biscuit).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, 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
- Sour milk
- Its acidity reacts with the baking soda to produce gas, helping the cookies rise and turn tender.
- Baking soda
- Reacts with the acid in sour milk to release carbon dioxide, leavening the dough and aiding browning.
- Butter
- Adds fat that tenderizes the crumb and carries flavor.
- Granulated sugar
- Sweetens the dough and helps it brown and stay soft during baking.
- Egg
- Binds the dough and adds structure and richness.
The step that matters
Mix in the baking soda and baking powder. Baking soda needs acid from the sour milk to work, so it should be mixed in promptly and evenly. Uneven distribution leaves bitter or soapy spots and uneven rising.
Swap the nutmeg
How well each one fits the dish's main ingredients (sugar, coffee, butter, egg, milk, flour):
- Cinnamonfits better
- Nutmegthe original
- Capersfits less well
- Jalapenofits less well
Fit is the average pairing score against sugar, coffee, butter, egg, milk, 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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