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Dessert

Opera Caramels

A caramel confection made with sugar, water, butter, vanilla, and powdered sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Opera Caramels

Ingredients

Directions

Make the syrup

  1. Combine sugar and water in a pot and boil until the soft ball stage.

  2. Add butter and vanilla extract, then remove from heat.

  3. Place the pot in a pan of cold water to stop further cooking.

Make the caramels

  1. Let it cool slightly, then rub the mixture against the sides with a spatula to encourage granulation.

  2. Stir the mixture into the remaining sugar until it becomes white and creamy.

  3. Dust a slab with powdered sugar, pour the mixture onto it, and roll it out to about ½ inch thick.

  4. Mark and cut into squares, then wrap each piece in wax paper.

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 + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

    Shared aroma: beta-damascenone (apple, rose).

  2. Butter + vanillatop 14% of all pairs
    Smell alikemoderate
    Cooked together20,050 recipes

    Shared aroma: guaiacol (smoky, sweet).

  3. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 recipes: they work on texture and structure more than aroma.

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

What each ingredient does

Sugar
Forms the sweet base and, once cooled and stirred, crystallizes into the soft, creamy texture.
Butter
Adds fat that softens the texture and gives the caramel a rich mouthfeel.
Water
Dissolves the sugar so it can be boiled to the correct concentration without burning.

The step that matters

Rubbing the cooled mixture against the sides with a spatula. Agitating the cooling syrup encourages sugar crystals to form. Stirring too early or too little changes the grain, so the candy may turn out too grainy or too hard.

“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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