Why it works: Molasses and sugar are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 9,225 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Butter Scotch
Ingredients
Directions
Make the butterscotch
Combine molasses, sugar, and butter in a granite or porcelain-lined kettle.
Boil rapidly, stirring constantly, for about 15 minutes or until it snaps in ice water.
Pour into square, buttered tins and allow to cool.
Cut and wrap
Turn out onto a board, mark desired sizes (about 1¼ by 2 inches), then cut through.
Wrap each piece in waxed paper.
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.
-
Molasses + sugartop 11% of all pairsSmell alikemoderateCooked together9,225 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Molasses + buttertop 30% of all pairsSmell alikelowCooked together8,123 recipes
Shared aroma: ethanol (alcoholic, ethereal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Molasses
- Provides the dark color, deep flavor, and chewy body of the candy.
- Sugar
- Adds sweetness and helps the mixture harden into a brittle, crisp candy when cooled.
- Butter
- Adds richness and fat, giving the candy a smoother texture and softer bite.
The step that matters
Boiling until it snaps in ice water. Candy sets based on how far the sugar concentration has risen, which depends on temperature. Boiling too briefly leaves it soft and sticky, while boiling too long can make it bitter or burnt. Testing in ice water shows when it has reached the hard-crack stage needed for a firm, brittle result.
“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.
More butter scotch recipes
You might also like
Molasses Cookies96 recipes
Molasses Cake90 recipes
Molasses Sponge Cake9 recipes
White Cake431 recipesThe free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.