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Dessert

Opera Creams

A sweet confection made by boiling cream and sugar, cooling into a thick mass, adding flavoring and nuts, then cutting into squares.

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

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 Creams

Ingredients

Directions

Cook the candy

  1. Boil the cream and sugar together until a soft ball forms when dropped into cold water.

  2. Remove from heat and let cool.

  3. Stir until it becomes a thick, creamy mass.

Rest, shape and cut

  1. Cover with a napkin wrung out of cold water for 25 minutes, then remove the napkin.

  2. Knead the mass like dough for a few minutes.

  3. Add flavoring and chopped nuts.

  4. Spread the mixture on oiled paper.

  5. Cut into 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.

Photo for illustrative purposes only · Contact us to use it

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

Sugar
Provides sweetness and, when boiled, the firm structure of the candy.
Cream
Adds fat for a smooth, creamy texture in the finished candy.
Chopped nuts
Add texture and a crunchy contrast to the soft candy.

The step that matters

Boiling to the soft-ball stage. Sugar syrup must reach the soft-ball temperature range. Stopping early leaves the candy too soft to hold its shape, while going too far makes it hard and brittle once cooled.

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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