Why it works: Sugar and cream are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 43,450 recipes. Both carry 2,3-butanedione, which smells butter, sweet. The science ↓
Opera Caramels
Ingredients
Directions
Make the caramel
In a clean copper kettle, combine sugar, cream, and cream of tartar.
Cook the mixture until it reaches 238°F to 240°F.
Pour the mixture onto a damp slab and let it cool.
Finish the fondant
Once cool, use a paddle to cream it like other fondants.
Cover with a damp cloth and let it sit for one hour before using.
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 + creamtop 9% of all pairsSmell alikemoderateCooked together43,450 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
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 sets into a firm, sliceable structure as it cools.
- Cream
- Adds fat and milk solids that give the caramel a soft, smooth, rich texture.
- Cream of tartar
- Acidifies the syrup, helping prevent crystallization so the candy stays smooth.
The step that matters
Cook to 238°F to 240°F. Sugar concentration at this temperature determines firmness once cooled. Undercooking leaves the candy soft and sticky, while overcooking makes it hard and grainy.
“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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