Name: Chocolate Cook Iks
Ingredients: one square chocolate; two teaspoonfuls baking powder; one teacup sugar; one-half teacup butter; one teacup of milk; two eggs

Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and 81,283 recipes mention both. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Chocolate Cook Iks

Ingredients

Directions

One teacup sugar, one-half teacup butter, one square chocolate, one teacup of milk, two eggs, two teaspoonfuls baking powder and flour enough to mix stiff. Drop in tins.— Mrs. James Dalton, Williams, Ariz.

Recipe from a historical cookbook (Internet Archive).

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. See the original page.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.

Butter + milktop 7% of all pairs

Aroma overlapmoderate

Mentioned together81,283 recipes

Shared aroma: (z)-4-heptenal (biscuit, cream).
Chocolate + sugartop 13% of all pairs

Aroma overlapmoderate

Mentioned together15,404 recipes

Shared aroma: guaiacol (smoky, sweet).
Chocolate + milktop 13% of all pairs

Aroma overlapmoderate

Mentioned together9,128 recipes

Shared aroma: gamma-nonanolactone (coconut, sweet).
Chocolate + buttertop 16% of all pairs

Aroma overlapmoderate

Mentioned together10,543 recipes

Shared aroma: delta-decalactone (sweet, creamy).
Butter + eggtop 17% of all pairs

Aroma overlapmoderate

Mentioned together118,967 recipes

Shared aroma: decanal (soap, orange peel).