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Dessert

Treacle Toffee

Treacle Toffee is a sweet confection made from treacle, brown sugar, butter, vinegar, soda, and almond essence.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Butter and almond are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 9,245 recipes. Both carry 2,3-pentanedione, which smells butter, sweet. The science ↓

Treacle Toffee

Ingredients

Directions

Make the toffee

  1. In a sugar boiler or saucepan, combine the brown sugar and vinegar until dissolved.

  2. Add the treacle and boil until it reaches the "large ball" stage.

  3. Remove from heat, then add the carbonate of soda dissolved in a little hot water, the butter, and almond essence.

  4. Boil again until it reaches the "little crack" stage.

Set and break

  1. Pour the mixture into an oiled or buttered tin.

  2. When partially set, mark into bars or squares, and once firm, break into sections.

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

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

  2. Sugar + vinegartop 15% of all pairs
    Smell alikemoderate
    Cooked together20,806 recipes

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

  3. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  4. Sugar + almondtop 18% of all pairs
    Smell alikemoderate
    Cooked together15,679 recipes

    Shared aroma: 1-penten-3-one (fish, pungent).

  5. Butter + vinegartop 23% of all pairs
    Smell alikemoderate
    Cooked together13,513 recipes

    Shared aroma: isoamyl acetate (banana, pear).

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

What each ingredient does

Treacle
Provides the dark color, rich flavor and chewy body of the toffee.
Brown sugar
Adds sweetness and helps the mixture dissolve and caramelize as it cooks.
Vinegar
Adds acidity that helps keep the sugar smooth and prevents crystallization.
Baking soda
Reacts with the acid to create gas bubbles that lighten the toffee's texture.
Butter
Adds fat for a softer bite and a richer, smoother mouthfeel.

The step that matters

Boil to the "little crack" stage after adding the soda. Toffee sets by hardening as its sugar concentration rises with cooking. Stopping too early leaves it sticky, while overcooking makes it brittle or burnt. Adding the soda foams the mixture, so it must be stirred in carefully.

Swap the almond

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

  1. Almondthe original
  2. Sesamefits about as well
  3. Soybeanfits about as well
  4. Peanutfits less well

Fit is the average pairing score against sugar, butter, vinegar. 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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