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Dessert

Russian Toffee

A caramelized sugar confection made with butter, syrup, condensed milk, and vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Syrup and condensed milk match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 118 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

Russian Toffee

Ingredients

Directions

Cook the toffee

  1. In a pan, combine sugar, butter, syrup, and condensed milk.

  2. Boil for 10 minutes, stirring constantly.

  3. Remove from heat and stir in vanilla essence.

Set and cut

  1. Pour into a buttered tin and let cool.

  2. Once cool, cut into neat 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. Syrup + condensed milktop 2% of all pairs
    Smell alikestrong
    Cooked together118 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  2. Sugar + syruptop 6% of all pairs
    Smell alikestrong
    Cooked together5,842 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

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

  4. Sugar + condensed milktop 11% of all pairs
    Smell alikemoderate
    Cooked together804 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  5. Syrup + vanillatop 12% of all pairs
    Smell alikelow
    Cooked together1,855 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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
Provides sweetness and, as it cooks, the firm body of the toffee.
Butter
Adds fat for a rich flavour and a smooth, tender bite.
Syrup
Interferes with sugar crystals, keeping the toffee smooth rather than grainy.
Condensed milk
Adds milk solids that brown during cooking and give a creamy, chewy texture.

The step that matters

Boil while stirring constantly. Constant stirring stops the sugar and milk from scorching on the base of the pan. The boiling evaporates water, so the toffee sets firm once it cools.

“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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