Name: Chocolate Trifle
Ingredients: 1 quart milk; 4 tablespoons Baker's chocolate; ¾ cup sugar; 6 eggs; 1 pint whipped cream; ¼ teaspoon coarse sea salt (formerly 'bay salt'); 1 teaspoon vanilla extract; a bit of baking soda

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 ↓

Chocolate Trifle

Ingredients

Directions

Make the custard

Heat the milk in a saucepan with the baking soda and salt.
Dissolve the chocolate in a little cold milk and stir it into the hot milk.
Beat the eggs and sugar together in a bowl.
Pour the hot milk and chocolate mixture over the egg mixture and mix thoroughly.
Return the mixture to the heat, stirring constantly until it thickens.
Pour the mixture into a bowl, add vanilla extract, and let it cool.

Assemble and serve

Before serving, transfer to a glass bowl and top with the whipped cream.

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.

Milk + vanillatop 5% of all pairs

Smell alikemoderate

Cooked together19,187 recipes

Shared aroma: ethyl caproate (fruity, apple peel).
Chocolate + vanillatop 5% of all pairs

Smell alikemoderate

Cooked together10,020 recipes

Shared aroma: sotolon (curry, maple).
Sugar + vanillatop 8% of all pairs

Smell alikelow

Cooked together35,032 recipes

Shared aroma: beta-damascenone (apple, rose).
Sugar + creamtop 9% of all pairs

Smell alikemoderate

Cooked together43,450 recipes

Shared aroma: 2,3-butanedione (butter, sweet).
Chocolate + creamtop 11% of all pairs

Smell alikemoderate

Cooked together5,466 recipes

Shared aroma: delta-decalactone (sweet, creamy).

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: Thicken the custard as they cook, giving it body and structure.
Milk: Forms the liquid base of the custard and provides creaminess.
Baker's chocolate: Supplies the chocolate flavour and dark colour of the custard.
Sugar: Sweetens the custard and balances the bitterness of the chocolate.
Whipped cream: Adds a light, rich topping that contrasts with the dense custard.

The step that matters

Return the mixture to the heat, stirring constantly until it thickens. Egg proteins set at around 160°F to 180°F, so heating too fast or without stirring can scramble the eggs into lumps. Constant stirring keeps the custard smooth and thickened.

“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.