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Dessert

Neapolitan Cake

A layered cake with a dark molasses coffee mixture and a white butter‑sugar batter.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 18 ingredients
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Why it works: Flour and raisin match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 9,075 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Neapolitan 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.

Prepare

  1. Preheat the oven to 350°F (175°C).

Make the dark batter

  1. In a bowl, cream together brown sugar and ½ cup butter.

  2. Add molasses, strong coffee, and eggs; mix well.

  3. Stir in 2½ cups flour, raisins, baking soda, cinnamon, cloves, and mace.

Make the white batter

  1. In another bowl, cream together 2 cups sugar and ½ cup butter.

  2. Add sweet milk, 2 cups flour, corn starch, egg whites, and baking powder; mix until smooth.

Bake

  1. Layer the dark and white mixtures in a greased cake pan.

  2. Bake for 30‑40 minutes or until a toothpick comes out clean.

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. Flour + raisintop 1% of all pairs
    Smell alikestrong
    Cooked together9,075 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Raisin + cinnamontop 1% of all pairs
    Smell alikemoderate
    Cooked together5,390 recipes

    Shared aroma: 1-octen-3-ol (mushroom, earthy).

  3. Flour + cinnamontop 9% of all pairs
    Smell alikemoderate
    Cooked together17,341 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Sugar + cinnamontop 10% of all pairs
    Smell alikelow
    Cooked together30,779 recipes

    Shared aroma: guaiacol (smoky, sweet).

  5. Coffee + cinnamontop 10% of all pairs
    Smell alikemoderate
    Cooked together895 recipes

    Shared aroma: 4-methoxybenzaldehyde (sweet, anise).

Sugar and cinnamon barely smell alike, yet cooks put them together in 30,779 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

Flour
Provides the structure that holds the cake together as it bakes.
Eggs
Bind the batter and add structure and richness to the crumb.
Butter
Adds fat for tenderness and flavor in both batters.
Brown sugar
Adds moisture and deep sweetness to the dark batter.
Molasses
Contributes moisture, dark color, and a rich, slightly bitter flavor.
Baking soda
Reacts with the acidic molasses and coffee to help the cake rise.

The step that matters

Layering the two batters. The dark and white batters have different densities and rise at different rates, so pour them gently to keep distinct layers rather than letting them fully swirl together.

Swap the raisin

How well each one fits the dish's main ingredients (sugar, butter, molasses, coffee, egg, flour, cinnamon):

  1. Raisinthe original
  2. Vanillafits about as well
  3. Figfits less well
  4. Blueberryfits less well

Fit is the average pairing score against sugar, butter, molasses, coffee, egg, flour, cinnamon. 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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