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Caramel Filling

A sweet filling made by cooking sugar, milk, butter, and caramel syrup until creamy.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Caramel Filling

Why it works: Sugar and syrup match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 5,842 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

Caramel Filling

Ingredients

Directions

Make the caramel

  1. Caramelize ½ cup sugar in a heavy skillet until it boils.

Cook the filling

  1. Combine milk and 3 cups sugar in a saucepan over medium heat.

  2. Pour the caramel into the milk and sugar mixture while both are boiling.

  3. Cook until the mixture forms a soft ball when tested in cold water.

  4. Stir in the butter and remove from heat.

Finish and spread

  1. Once slightly cooled, beat until creamy and spread on cake.

  2. If the filling becomes too stiff, add a little cream.

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.

Photo for illustrative purposes only · Contact us to use it

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

    Shared aroma: ethanol (alcoholic, ethereal).

  2. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

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

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

    Shared aroma: guaiacol (smoky, sweet).

  4. Sugar + milktop 18% of all pairs
    Smell alikelow
    Cooked together77,875 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Syrup + milktop 25% of all pairs
    Smell alikelow
    Cooked together2,143 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

Sugar and milk barely smell alike, yet cooks put them together in 77,875 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, forms the body and caramel flavour of the filling.
Milk
Adds moisture and dairy richness, and its proteins help give the filling a creamy texture.
Caramel syrup
Adds concentrated caramel flavour and deepens the colour of the filling.
Butter
Adds fat for smoothness and a rich mouthfeel in the finished filling.

The step that matters

Cook to a soft ball stage. Sugar syrup sets as it cools based on how far its water has boiled off. Stopping too early leaves a runny filling, while cooking too long makes it hard and grainy once beaten.

“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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