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Dessert

Russian Toffee

A caramelized sugar and butter confection flavored with vanilla, sweet milk, and condensed milk.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Condensed milk and syrup 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

  1. Heat the sweet milk and syrup in a saucepan.

  2. Add the brown sugar, butter, and vanilla extract.

  3. Boil the mixture for half an hour, stirring occasionally.

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. Condensed milk + syruptop 2% of all pairs
    Smell alikestrong
    Cooked together118 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  2. Vanilla + milktop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

    Shared aroma: ethyl caproate (fruity, apple peel).

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

    Shared aroma: ethanol (alcoholic, ethereal).

  4. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

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

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

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

Brown sugar
Adds sweetness and a deep caramel flavour that defines the toffee.
Butter
Provides fat for a rich, smooth texture and a buttery flavour.
Condensed milk
Adds sugar and milk solids that brown during cooking and give a creamy, chewy body.
Sweet milk
Supplies liquid that dissolves the sugars and helps the mixture cook evenly.
Syrup
Adds sweetness and helps prevent the sugar from crystallising.
Vanilla extract
Adds aroma that rounds out the sweet, caramel flavour.

The step that matters

Boil the mixture for half an hour, stirring occasionally. Sugar and milk solids can scorch on the base of the pan if left unstirred, giving a burnt taste. Regular stirring keeps the heat even and the mixture from sticking.

“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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