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Dessert

Swiss Milk Toffee

A sweet confection made from butter, golden syrup, white sugar, Swiss milk, and vanilla essence.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓

Swiss Milk Toffee

Ingredients

Directions

Prepare

  1. Rinse a clean enamel saucepan with cold water and leave a teaspoonful in.

Make the toffee

  1. Add the butter, golden syrup, and white sugar to the saucepan.

  2. Melt the mixture over low heat, then stir in the Swiss milk.

  3. Boil for exactly 20 minutes.

  4. Remove from heat and stir in the vanilla essence.

Set and cut

  1. Pour the mixture onto a buttered dish and score when 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. Milk + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

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

  2. Syrup + sugartop 6% of all pairs
    Smell alikestrong
    Cooked together5,842 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

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

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

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

  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

Butter
Adds fat for a rich, soft texture and smooth mouthfeel.
White sugar
Provides sweetness and, when boiled, forms the firm toffee structure as it sets.
Golden syrup
Inhibits sugar crystallisation, keeping the toffee smooth rather than grainy.
Swiss milk
Adds milk solids and moisture that brown during boiling for a creamy, caramel flavour.

The step that matters

Boil for exactly 20 minutes. Boiling drives off water and concentrates sugar, so the final firmness depends on the time and temperature. Too short leaves the toffee soft and sticky; too long makes it hard or burnt.

“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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