Why it works: Sugar and buttermilk match in chemistry and in kitchens. They rank in the top 9% of all ingredient pairs, and cooks put them together in 2,973 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Christmas 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.
Make the dough
Cream the butter and brown sugar together.
Add the buttermilk and baking soda, mixing well.
Stir in the powdered coriander seed and mixed spices.
Form a stiff dough and roll it out thin.
Bake and store
Bake at 350°F (175°C) until golden.
Store in an earthen jar for up to 6 months.
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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Sugar + buttermilktop 9% of all pairsSmell alikestrongCooked together2,973 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Butter + sugartop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Butter + buttermilktop 20% of all pairsSmell alikemoderateCooked together2,674 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Buttermilk + coriandertop 26% of all pairsSmell alikelowCooked together49 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Butter + coriandertop 29% of all pairsSmell alikemoderateCooked together1,574 recipes
Shared aroma: trans-2-decenal (waxy, orange).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Butter
- Creams with sugar to give the cookies richness and a tender crumb.
- Brown sugar
- Adds sweetness, moisture and caramel flavour, and helps the cookies brown.
- Buttermilk
- Adds moisture and acidity that works with the baking soda.
- Baking soda
- Reacts with the acidic buttermilk to release gas, helping the cookies rise and brown.
- Powdered coriander seed
- Contributes aroma and a warm, citrusy spice flavour to the dough.
The step that matters
Rolling the dough thin. A stiff dough rolled too thick may bake unevenly, staying doughy in the centre while the edges over-brown. Rolling to an even, thin thickness lets the cookies bake through and turn golden at the same rate.
Swap the coriander
How well each one fits the dish's main ingredients (butter, sugar, buttermilk):
- Cinnamonfits better
- Nutmegfits better
- Gingerfits better
- Corianderthe original
Fit is the average pairing score against butter, sugar, buttermilk. 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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