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Dessert

Treacle Sponge

A sweet sponge cake made with treacle, golden syrup, suet, flour, milk, baking powder, and lemon rind.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Flour and milk are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Treacle Sponge

Ingredients

Directions

Prepare

  1. Warm the golden syrup and milk together in a basin in the oven.

  2. Mix the flour, baking powder, and suet together well.

Mix and steam

  1. Gradually stir the dry mixture into the warm milk and treacle until combined.

  2. Pour the mixture into a well-buttered mold.

  3. Tie a floured cloth over the mold and boil for 2 hours.

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 + milktop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Milk + lemontop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

  3. Syrup + flourtop 16% of all pairs
    Smell alikemoderate
    Cooked together2,540 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  4. Flour + lemontop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Syrup + lemontop 20% of all pairs
    Smell alikelow
    Cooked together2,235 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

Flour and milk barely smell alike, yet cooks put them together in 78,219 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
Forms the main structure of the cake as it sets around the air bubbles.
Baking powder
Releases gas during cooking, helping the sponge rise and become light.
Suet
Adds fat that keeps the crumb tender and moist during steaming.
Golden syrup
Adds sweetness, moisture and a rich flavour that browns slightly as it cooks.
Milk
Hydrates the flour and dissolves the syrup to form a pourable batter.

The step that matters

Boil for 2 hours with the cloth tied over the mold. The mold must stay submerged and the cloth must be tied securely so water does not enter. Steady simmering cooks the batter through evenly and gently, producing a moist, light texture without collapsing the rise.

Swap the lemon

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

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

Fit is the average pairing score against syrup, flour, milk. 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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