Name: Marbled Biscuit Tart
Ingredients: biscuit batter (for Biscuit Tart Cake); cochineal (for coloring); chocolate (for coloring); ¼ pound pistachio nuts, finely pounded; butter (for greasing the cake form)

Why it works: Biscuit and pistachio share more aroma than cooks usually use. They rank in the top 1% of all ingredient pairs, and cooks put them together in 53 recipes. Both carry nonanal, which smells fat, citrus. The science ↓

Marbled Biscuit Tart

Oven, in the book's wordsA slow oven

Ingredients

biscuit batter (for Biscuit Tart Cake)
cochineal (for coloring)
chocolate (for coloring)
¼ pound pistachio nuts, finely pounded
butter (for greasing the cake form)

Directions

The book says “a slow oven”. The 300°F in the steps is the modern equivalent, not the book's own figure.

Make a biscuit batter like that for Biscuit Tart Cake.
Divide the batter into five equal parts.
Color one part with cochineal, another with chocolate, and mix a third part with finely pounded pistachio nuts.
Leave the remaining two parts uncolored.
Butter a high cake form well.
Pour in part of the uncolored batter, then add the chocolate batter, followed by the pistachio batter, more uncolored batter, and finally the pink batter.
Bake in a slow oven (300°F / 150°C).
Frost with pink icing.

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.

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.

Biscuit + pistachiotop 1% of all pairs

Smell alikestrong

Cooked together53 recipes

Shared aroma: nonanal (fat, citrus).
Pistachio + nutstop 1% of all pairs

Smell alikestrong

Cooked together425 recipes

Shared aroma: alpha-pinene (pine, turpentine).
Biscuit + nutstop 7% of all pairs

Smell alikestrong

Cooked together38 recipes

Shared aroma: maltol (caramel, sweet).
Chocolate + nutstop 10% of all pairs

Smell alikemoderate

Cooked together440 recipes

Shared aroma: furaneol (caramel, strawberry).
Chocolate + pistachiotop 12% of all pairs

Smell alikemoderate

Cooked together209 recipes

Shared aroma: nonanal (fat, citrus).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

Swap the nuts

How well each one fits the dish's main ingredients (biscuit, chocolate, pistachio, butter):

Almondfits better
Hazelnutfits better
Cashew nutfits better
Nutsthe original

Fit is the average pairing score against biscuit, chocolate, pistachio, butter. Candidates are from the same food group and used in at least 100 recipes.