Why it works: Flour and milk are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Sour-milk Biscuit
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Make the dough
Sift together the flour, salt, baking powder, and baking soda.
Cut in the shortening.
Add the sour milk and mix until combined.
Ensure the milk is sufficiently sour to neutralize the baking soda.
Bake
Bake in a hot oven at 400°F (200°C) for 10 to 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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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and milk barely smell alike, yet cooks put them together in 78,219 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
- Flour
- Provides the structure that holds the biscuit together as it bakes.
- Shortening
- Coats flour particles and creates tender layers and a flaky texture.
- Sour milk or buttermilk
- Adds moisture and acidity that reacts with baking soda to help the biscuit rise.
- Baking soda
- Reacts with the acid in sour milk to produce gas that lightens the biscuit.
- Baking powder
- Supplies additional leavening gas so the biscuit rises during baking.
The step that matters
Checking that the milk is sour enough. Baking soda needs an acid to react with. If the milk is not sour enough, the soda will not be neutralized, leaving a soapy taste and poor rise.
“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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