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Dessert

Naples Biscuits

A sweet biscuit made with Lisbon sugar, orange‑flower water, eggs, and flour, baked until golden.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Sugar and flour are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. The science ↓

Naples Biscuits

Oven, in the book's wordsA hot oven

Ingredients

Directions

The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.

Make the syrup

  1. Combine Lisbon sugar, water, and orange‑flower water in a saucepan.

  2. Boil until the sugar is melted.

Make the batter

  1. Whisk the eggs (both whites and yolks) until well combined.

  2. Pour the syrup into the eggs while whisking continuously.

  3. Gradually add the flour, mixing until smooth.

Shape and bake

  1. Drop the mixture onto waxed iron plates in shilling‑sized drops.

  2. Let the biscuits sit in a warm place for half a day until set and hard.

  3. Bake in a hot oven at 400°F (200°C) until golden.

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. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  2. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Sugar + orangetop 20% of all pairs
    Smell alikelow
    Cooked together19,212 recipes

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

  4. Sugar + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Orange + flourtop 21% of all pairs
    Smell alikemoderate
    Cooked together6,821 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Egg and flour barely smell alike, yet cooks put them together in 106,462 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
Whisked eggs provide structure and lift, setting the batter as it bakes.
Flour
Forms the gluten and starch network that gives the biscuits their body.
Lisbon sugar
Dissolved into syrup to add sweetness and help the biscuits brown.
Orange-flower water
Adds a floral aroma to the syrup.

The step that matters

Pour the syrup into the eggs while whisking continuously. Hot syrup poured in slowly while whisking gently cooks and blends the eggs; pouring it in one go or without whisking can scramble them and leave an uneven batter.

Swap the orange

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

  1. Raisinfits better
  2. Vanillafits better
  3. Lemonfits better
  4. Orangethe original

Fit is the average pairing score against sugar, egg, flour. 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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