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Dessert

Butter Scotch

A caramel candy made with sugar, water, butter, vinegar, and optional vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Butter Scotch

Ingredients

Directions

Make the butterscotch

  1. In a kettle, combine sugar and water and bring to a boil.

  2. Add butter and vinegar, then let it boil for 20 to 30 minutes.

  3. Once done, add vanilla extract if desired.

Set and cut

  1. Pour the mixture into buttered tins, ensuring it's no more than ¼ inch thick.

  2. When partly cold, cut into strips.

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. Sugar + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

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

  2. Butter + vanillatop 14% of all pairs
    Smell alikemoderate
    Cooked together20,050 recipes

    Shared aroma: guaiacol (smoky, sweet).

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

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

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

    Shared aroma: guaiacol (smoky, sweet).

  5. Vinegar + buttertop 23% of all pairs
    Smell alikemoderate
    Cooked together13,513 recipes

    Shared aroma: isoamyl acetate (banana, pear).

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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

Sugar
Forms the bulk of the candy and caramelizes into the brown, sweet base as it boils.
Butter
Adds fat and richness, giving the candy a smooth texture and buttery flavor.
Vinegar
Adds a little acidity that helps keep the sugar from crystallizing into a grainy texture.

The step that matters

Boiling for 20 to 30 minutes. Sugar syrup must reach the right concentration to set firm when cooled. Boiling too briefly leaves it soft and sticky, while overcooking can make it hard, dark, or bitter. Watching the time and color matters.

Swap the vanilla

The recipe marks vanilla as optional. How well each one fits the dish's main ingredients (sugar, vinegar, butter):

  1. Vanillathe original
  2. Strawberryfits about as well
  3. Apricotfits about as well
  4. Peachfits about as well

Fit is the average pairing score against sugar, vinegar, 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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