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Russian Toffee

A caramelized condensed milk toffee flavored with vanilla and butter.

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

Russian Toffee

Ingredients

Directions

Make the toffee

  1. In a saucepan, combine the condensed milk and brown sugar.

  2. Boil the mixture for 30 minutes, stirring frequently.

  3. Add the vanilla extract and butter, mixing well.

Cool and set

  1. Spread the toffee onto buttered plates to cool.

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. Condensed milk + sugartop 11% of all pairs
    Smell alikemoderate
    Cooked together804 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  3. Vanilla + buttertop 14% of all pairs
    Smell alikemoderate
    Cooked together20,050 recipes

    Shared aroma: guaiacol (smoky, sweet).

  4. Condensed milk + vanillatop 17% of all pairs
    Smell alikelow
    Cooked together647 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  5. 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

Condensed milk
Provides milk solids and sugar that brown and thicken into a toffee as it boils.
Brown sugar
Adds sweetness and molasses flavour, and helps the toffee caramelise during boiling.
Butter
Adds fat for a smooth, glossy texture and richer flavour.

The step that matters

Boil the mixture for 30 minutes, stirring frequently. Sugar and milk solids must reach the right concentration to set firm. Stirring prevents scorching on the base of the pan, which would give a burnt taste.

“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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