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Dessert

Opera Caramels

A caramel candy made with sugar, cream, and optional nuts or fruit, cooled and cut into squares.

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

  1. Boil sugar, cream of tartar, and cream together until it reaches the soft-ball stage.

  2. Once cool, add flavoring and chopped nuts or fruits.

  3. Stir until thick, then pour into a buttered dish to a depth of half an inch.

Set and cut

  1. When cold, cut into small squares.

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 + creamtop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

  2. Cream + nutstop 19% of all pairs
    Smell alikelow
    Cooked together886 recipes

    Shared aroma: 2-nonanone (fruity, floral).

  3. Sugar + nutstop 25% of all pairs
    Smell alikelow
    Cooked together2,228 recipes

    Shared aroma: 1-penten-3-one (fish, pungent).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Fine white sugar
Provides the sweetness and forms the crystalline-to-smooth candy base as it cooks.
Cream of tartar
Acidity that helps prevent sugar from crystallising too coarsely, keeping the candy smooth.
Cream
Adds fat and moisture, giving the caramel a soft, tender texture.
Chopped nuts or fruits
Adds texture and bite against the soft candy base.

The step that matters

Boil to the soft-ball stage. Sugar syrup must reach the right temperature to set correctly. Too little cooking leaves the candy soft and sticky, while overcooking makes it hard and brittle once cold.

Swap the nuts

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

  1. Almondfits better
  2. Pistachiofits better
  3. Chestnutfits better
  4. Nutsthe original

Fit is the average pairing score against sugar, cream. 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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