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Dessert

Treacle Candy

Treacle candy is a sweet made from treacle, brown sugar, citrus rind and juice, boiled until brittle.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Lemon and butter are a kitchen classic. They rank in the top 16% of all ingredient pairs, and cooks put them together in 41,227 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Treacle Candy

Ingredients

Directions

Make the candy

  1. In a thick block-tin kettle, combine the treacle and brown sugar.

  2. Boil slowly, skimming regularly and stirring to prevent burning.

  3. After boiling long enough to thicken, stir in the grated rind and juice of the lemons or oranges.

  4. Continue boiling and stirring until the mixture can no longer boil and the spoon won't move.

  5. Test a small amount in a saucer; if it cools to a brittle texture, it's done.

Set

  1. Remove from heat and transfer immediately to well-greased shallow square tin pans.

  2. Spread evenly and set aside to cool.

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 + buttertop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

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

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

    Shared aroma: guaiacol (smoky, sweet).

  3. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

Sugar and lemon barely smell alike, yet cooks put them together in 53,532 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

Treacle
Forms the bulk of the candy and gives it its dark color and rich, molasses-like flavor.
Brown sugar
Adds sweetness and helps the candy set firm and brittle as it cooks down.
Lemons or oranges (rind and juice)
Add aroma from the rind and acidity from the juice to balance the sweetness.

The step that matters

Testing for brittleness. Sugar syrups harden as their temperature rises and water evaporates. Cooking too little leaves a sticky candy that won't set, while cooking too long makes it bitter or hard to cut. A small saucer test shows when it has reached the brittle stage.

Swap the lemon

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

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

Fit is the average pairing score against sugar, butter. 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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