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Dessert

Royal Biscuit

A sweet biscuit made with flour, currants, butter, lemon zest, sugar, eggs, topped with almonds and orange peel.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Lemon and orange match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,634 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Royal Biscuit

Oven, in the book's wordsA moderate oven

Ingredients

Directions

The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Prepare the dough

  1. In a bowl, combine flour, currants, butter, lemon zest, sifted sugar, and eggs to form a paste.

  2. Roll out the paste.

  3. Cut it with a round cutter.

Top and bake

  1. Brush the tops with egg.

  2. Sprinkle with chopped almonds and orange peel.

  3. Bake in a moderate oven at 350°F (175°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. Lemon + orangetop 1% of all pairs
    Smell alikestrong
    Cooked together10,634 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  2. Flour + almondtop 5% of all pairs
    Smell alikemoderate
    Cooked together8,673 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Almond + orangetop 6% of all pairs
    Smell alikemoderate
    Cooked together3,125 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  4. Lemon + almondtop 10% of all pairs
    Smell alikestrong
    Cooked together5,655 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  5. Butter + almondtop 11% of all pairs
    Smell alikemoderate
    Cooked together9,245 recipes

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

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 biscuit together as it bakes.
Butter
Adds fat for a tender, rich crumb and a short texture.
Eggs
Bind the paste and add richness, structure and a golden surface when brushed on top.
Sugar
Adds sweetness and helps the tops brown as the biscuits bake.
Currants
Add concentrated sweetness and chewy pockets of fruit throughout the biscuit.

The step that matters

Bake until golden. Baking in a moderate oven until golden sets the flour and eggs and browns the sugars at the surface. Pulling them too early leaves the centre doughy, while overbaking dries them out and makes them hard.

Swap the currant

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

  1. Vanillafits better
  2. Raisinfits better
  3. Figfits better
  4. Currantthe original

Fit is the average pairing score against flour, butter, lemon, sugar, egg, almond, orange. 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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