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Neapolitan Ice Cream

A layered ice cream made with cream, milk, sugar, egg yolks, vanilla, chocolate, and fruit juice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Strawberry and vanilla are a kitchen classic. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,385 recipes. Both carry p-vinylguaiacol, which smells spicy, fruity. The science ↓

Neapolitan Ice Cream

Ingredients

Directions

Make the custard

  1. Beat egg yolks and 1½ cups sugar together, then add ½ cup milk.

  2. Heat remaining milk in a double boiler until boiling, then gradually pour over egg mixture while stirring.

  3. Return mixture to boiler and cook for 4 minutes, stirring constantly.

  4. Remove from heat, let cool, then add cream and vanilla, and freeze for 20 minutes.

Prepare the chocolate and tub

  1. Prepare a tub for a 3‑quart mold with ice and salt.

  2. In a small saucepan, combine chocolate, ⅓ cup sugar, and 1 tablespoon water, stirring until smooth, then add 2 more tablespoons water and set aside to cool.

Layer and freeze

  1. Take one‑third frozen cream, mix in chocolate until smooth, then pack into mold.

  2. Layer half of remaining cream on top of chocolate layer.

  3. Mix cochineal with fruit juice and fold into remaining frozen cream, then spread as top layer.

  4. Cover mold tightly and freeze for 2 hours before serving.

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.

  1. Strawberry + vanillatop 1% of all pairs
    Smell alikemoderate
    Cooked together1,385 recipes

    Shared aroma: p-vinylguaiacol (spicy, fruity).

  2. Milk + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

    Shared aroma: ethyl caproate (fruity, apple peel).

  3. Chocolate + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together10,020 recipes

    Shared aroma: sotolon (curry, maple).

  4. Vanilla + sugartop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

    Shared aroma: beta-damascenone (apple, rose).

  5. Cream + sugartop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

Vanilla and sugar 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

Egg yolks
Egg yolks thicken the custard base as they cook and add richness.
Cream
Cream adds fat, which keeps the frozen texture smooth and rich.
Milk
Milk supplies liquid and milk solids that give the base body.
Sugar
Sugar lowers the freezing point, keeping the ice cream softer and scoopable.
Chocolate
Chocolate adds deep flavour and fat, giving the chocolate layer a smooth, dense texture.
Strawberry or raspberry juice
Fruit juice adds fruity flavour and acidity to the fruit layer.

The step that matters

Stir the custard constantly while it cooks. Egg yolk proteins set as they heat and can curdle if the heat is too high or the mixture is left unstirred. Constant stirring keeps the custard smooth, which gives the finished ice cream a fine, even texture.

Swap the strawberry

How well each one fits the dish's main ingredients (cream, milk, chocolate, vanilla, sugar, egg):

  1. Coconutfits about as well
  2. Strawberrythe original
  3. Raspberryfits about as well
  4. Figfits about as well

Fit is the average pairing score against cream, milk, chocolate, vanilla, sugar, egg. 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.

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