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Dessert

Butter Scotch

A brittle made by boiling sugar, molasses, and butter until brittle, then adding vanilla and pouring into greased pans.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 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 brittle

  1. Boil sugar, molasses, and butter together until brittle when dropped in cold water.

  2. Remove from heat, then add vanilla.

Pour and set

  1. Pour into greased pans.

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. Sugar + molassestop 11% of all pairs
    Smell alikemoderate
    Cooked together9,225 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  3. Vanilla + buttertop 14% of all pairs
    Smell alikemoderate
    Cooked together20,050 recipes

    Shared aroma: guaiacol (smoky, sweet).

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

    Shared aroma: guaiacol (smoky, sweet).

  5. Molasses + vanillatop 24% of all pairs
    Smell alikelow
    Cooked together732 recipes

    Shared aroma: ethyl isobutyrate (fruity, ethereal).

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
Sets into a hard, crisp brittle as the mixture cooks and cools.
Molasses
Adds dark color, deep caramel-like flavor, and sweetness.
Butter
Adds fat for richer flavor and a more tender bite.
Vanilla
Adds a mild aroma that rounds out the molasses flavor.

The step that matters

Boil to the right point. Stop boiling at the right point: too early and the brittle stays soft and sticky; too long and the sugar darkens and tastes bitter. The cold-water test works because sugar hardens as its temperature rises.

Swap the vanilla

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

  1. Vanillathe original
  2. Raisinfits about as well
  3. Figfits less well
  4. Applefits less well

Fit is the average pairing score against sugar, molasses, 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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