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Dessert

Karo Taffy

A chewy candy made from Karo syrup, sugar, vinegar, butter, 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 sugar 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 ↓

Karo Taffy

Ingredients

Directions

Make the taffy

  1. Combine Karo syrup, granulated sugar, vinegar, and butter in a saucepan.

  2. Boil the mixture until it becomes brittle when tested in cold water.

  3. Remove from heat and stir in vanilla extract.

Set and cut

  1. Pour the mixture into a buttered pan.

  2. Once cooled, cut into squares and then into short lengths.

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

    Shared aroma: ethanol (alcoholic, ethereal).

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

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

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

    Shared aroma: ethanol (alcoholic, ethereal).

  4. Butter + vanillatop 14% of all pairs
    Smell alikemoderate
    Cooked together20,050 recipes

    Shared aroma: guaiacol (smoky, sweet).

  5. Sugar + vinegartop 15% of all pairs
    Smell alikemoderate
    Cooked together20,806 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

Karo syrup
Provides sweetness and a smooth, chewy body that resists crystallising.
Granulated sugar
Adds sweetness and sets firm as the mixture is boiled and cooled.
Vinegar
Adds acidity that helps prevent the sugar from forming large crystals.
Butter
Adds fat that softens the texture and keeps the taffy from sticking.

The step that matters

Boiling to the brittle stage. The mixture must reach the hard-crack stage, where a drop turns brittle in cold water. Stop too early and the taffy stays sticky; go too far and it turns hard and unpleasant to chew. Temperature control at this point decides the final texture.

“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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