Why it works: Sugar and syrup match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 5,842 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Good Toffee
Ingredients
Directions
In a pan, combine sugar, syrup, butter, and sweet milk.
Melt the mixture over low heat.
Once melted, add the beaten egg and stir well.
Boil the mixture for 30 minutes.
Pour into a greased tin and let it cool.
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.
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Sugar + syruptop 6% of all pairsSmell alikestrongCooked together5,842 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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Milk + eggtop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Sugar
- Dissolves and caramelises during boiling to give the toffee its sweetness and firm, brittle body.
- Butter
- Adds fat for a rich mouthfeel and helps the toffee set smooth rather than grainy.
- Sweet milk
- Adds moisture and milk solids that brown during boiling, giving a creamier, deeper flavour.
- Egg
- Enriches the mixture and adds protein that helps it set and hold together as it cooks.
- Syrup
- Adds sweetness and invert sugars that help keep the toffee smooth and less prone to crystallising.
The step that matters
Boil the mixture for 30 minutes. Boiling drives off water and concentrates the sugar, so the toffee sets firm when cooled. Too short a boil leaves it soft and sticky, while overcooking can make it bitter or hard to cut.
“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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