Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓
Black Chocolate Cake
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.
Make the batter
Preheat the oven to 350°F (175°C).
In a bowl, cream together the sugar and butter.
Add the beaten eggs and mix well.
Heat ½ cup of milk on the stove and stir in the grated chocolate until melted. Let the chocolate mixture cool.
Add the cooled chocolate mixture to the batter.
In another bowl, mix ½ cup of milk with the baking soda. Combine this milk mixture with the batter.
Sift in the flour and baking powder, then add vanilla extract. Mix until smooth and pour into a greased cake pan.
Bake
Bake for 30-35 minutes or until a toothpick comes out clean.
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.
-
Milk + vanillatop 5% of all pairsSmell alikemoderateCooked together19,187 recipes
Shared aroma: ethyl caproate (fruity, apple peel).
-
Chocolate + vanillatop 5% of all pairsSmell alikemoderateCooked together10,020 recipes
Shared aroma: sotolon (curry, maple).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Sugar + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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
- Eggs
- Bind the batter and add structure as they set during baking.
- Flour
- Forms the cake's structure once heated and set.
- Butter
- Adds fat for a tender crumb and rich flavour.
- Sugar
- Sweetens the cake and helps it brown and stay moist.
- Baking soda
- Reacts with the milk and chocolate to help the cake rise.
- Baking powder
- Releases gas during baking to give the cake lift.
The step that matters
Cooling the chocolate mixture before adding it. If the melted chocolate mixture is still hot, it can scramble the eggs and make the batter curdle or uneven. Letting it cool first keeps the batter smooth and stable.
“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.
More chocolate cake recipes
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.

Chocolate Cream171 recipes
Vanilla Ice Cream108 recipes
Chocolate Cookies76 recipes
Chocolate Fudge55 recipes