Why it works: Flour and buttermilk are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 3,721 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Spice Cake
Ingredients
Directions
The book says “a sharp oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Mix the batter
Sift together the tartar and baking soda with the flour.
Add the moist sugar, currants, and allspice.
Mix into a batter using buttermilk.
Bake and cut
Pour the batter into a baking pan.
Bake in a sharp oven at 400°F (200°C).
Cut into squares when cold.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Flour + buttermilktop 8% of all pairsSmell alikemoderateCooked together3,721 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Sugar + buttermilktop 9% of all pairsSmell alikestrongCooked together2,973 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Currant + allspicetop 10% of all pairsSmell alikelowCooked together1,359 recipes
Shared aroma: ethyl benzoate (fruity, sweet).
-
Flour + allspicetop 13% of all pairsSmell alikemoderateCooked together4,302 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tartar
- Acts with the baking soda to release gas, helping the cake rise.
- Baking soda
- Reacts with the acid in the batter to produce gas that lightens the crumb.
- Flour
- Provides the structure that holds the cake together as it sets.
- Moist sugar
- Adds sweetness and moisture, and helps the cake brown and stay tender.
- Buttermilk
- Adds moisture and acidity, which activates the baking soda.
The step that matters
Bake in a sharp oven at 400°F (200°C). Once the acid and baking soda meet liquid, they start releasing gas right away. A hot oven and prompt baking lock in that rise before it fades, giving a lighter cake.
Swap the currant
How well each one fits the dish's main ingredients (flour, sugar, allspice, buttermilk):
- Raisinfits better
- Vanillafits better
- Lemonfits better
- Currantthe original
Fit is the average pairing score against flour, sugar, allspice, 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Red Currant Jelly65 recipes
Currant Ice Cream32 recipes
Buttermilk Pie12 recipes
Currant Sherbet9 recipes