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Dessert

Halfpenny Gingerbread Squares

A gingerbread dough made with flour, treacle, baking soda, pearlash, and alum, baked into squares.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Flour and molasses are a kitchen classic. They rank in the top 16% of all ingredient pairs, and cooks put them together in 10,429 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

Halfpenny Gingerbread Squares

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

  1. Combine the flour, treacle, and baking soda in a large bowl.

  2. Dissolve the pearlash in ½ cup of cold water.

  3. Pour the dissolved pearlash into the mixture.

  4. Add another ½ cup of water to a small pan and mix it well.

Make the dough

  1. Knead the dough until smooth.

  2. Spread the dough into a greased baking pan.

Bake and serve

  1. Bake in a moderate oven at 350°F (175°C) until firm.

  2. Allow the baked dough to cool.

  3. Cut the cooled dough into squares.

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 + molassestop 16% of all pairs
    Smell alikemoderate
    Cooked together10,429 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

All-purpose flour
Provides the structure that holds the dough together as it bakes.
Treacle
Adds sweetness, moisture, and a dark colour and rich flavour.
Pearlash
Reacts with the dough to lift it and give it a lighter crumb.
Baking soda
Helps the dough rise and encourages browning in the oven.

The step that matters

Bake until firm. The dough sets as its proteins and starches cook through. Pulling it too early leaves a damp, gummy centre that will not cut cleanly into squares.

“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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