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 ↓
Soda Cake
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Sift the flour into a bowl.
Rub the butter and dripping into the flour.
Make the batter
Add the currants, sultanas, brown sugar, nutmeg, and candied peel.
Dissolve the baking soda in a small amount of milk and add it to the mixture.
Beat the eggs and mix them with the remaining milk, then add to the bowl.
Bake
Pour the batter into a mold lined with oiled paper.
Bake in a moderate oven at 350°F (175°C) for 1 to 1.5 hours.
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.
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Flour + nutmegtop 8% of all pairsSmell alikemoderateCooked together18,623 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
Flour and butter 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
- Flour
- Provides the structure that holds the dense fruit and batter together as it bakes.
- Eggs
- Bind the mixture and add structure and richness as they set in the oven.
- Baking soda
- Reacts with the acidity in the mixture to produce gas that helps the cake rise.
- Butter
- Adds fat for a tender crumb and rich flavor.
- Brown sugar
- Adds sweetness and moisture, and contributes to browning and a deeper flavor.
- Currants
- Add chewy texture and concentrated sweetness throughout the cake.
The step that matters
Dissolving the baking soda before adding it. Baking soda needs to be evenly dispersed in the liquid so it reacts uniformly with the acid in the batter. Clumps can leave bitter spots or uneven rising.
Swap the currant
How well each one fits the dish's main ingredients (flour, sugar, egg, butter, milk, nutmeg):
- Vanillafits better
- Raisinfits better
- Figfits better
- Currantthe original
Fit is the average pairing score against flour, sugar, egg, butter, milk, nutmeg. 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
Currant Sherbet9 recipes
Currant and Raspberry Ice7 recipes