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Dessert

Divinity Fudge

A fudge made with sugar, boiling water, Karo corn syrup, egg whites, vanilla, and nuts.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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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 ↓

Divinity Fudge

Ingredients

Directions

Make the syrup

  1. Combine sugar, boiling water, and Karo corn syrup in a pot.

  2. Boil the mixture until it forms a soft ball in cold water.

  3. Remove one cup of the mixture.

Whip and combine

  1. Pour the removed cup over the beaten egg whites.

  2. Beat the egg mixture until stiff.

  3. Continue boiling the remaining mixture until it becomes brittle in cold water.

  4. Pour the hot mixture over the egg mixture.

  5. Beat the mixture again until creamy.

  6. Add vanilla and chopped nuts. Mix well.

Set and cut

  1. Pour the mixture into buttered pans.

  2. Let it harden before cutting into squares.

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

    Shared aroma: ethanol (alcoholic, ethereal).

  2. Vanilla + nutstop 8% of all pairs
    Smell alikemoderate
    Cooked together638 recipes

    Shared aroma: alpha-pinene (pine, turpentine).

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

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

  4. Corn + vanillatop 9% of all pairs
    Smell alikemoderate
    Cooked together1,943 recipes

    Shared aroma: ethyl cinnamate (sweet, balsamic).

  5. Corn + nutstop 12% of all pairs
    Smell alikemoderate
    Cooked together104 recipes

    Shared aroma: 2,3-pentanedione (butter, 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

Egg whites
Beaten into a foam that gives the fudge its light, airy structure.
Sugar
Forms the sweet, crystalline candy base once boiled to the correct stage.
Karo corn syrup
Interferes with sugar crystallization, keeping the candy smooth rather than grainy.
Chopped nuts
Add crunch and texture against the soft, creamy candy.

The step that matters

Boiling to the right stage. Sugar syrup must reach the exact soft-ball or brittle stage, which depends on its concentration and temperature. Underheating leaves the fudge soft and sticky, while overheating makes it hard and brittle. Hot syrup poured over the egg whites must be added steadily so the candy sets properly.

Swap the nuts

How well each one fits the dish's main ingredients (sugar, corn, syrup, egg, vanilla):

  1. Chestnutfits better
  2. Almondfits better
  3. Hazelnutfits better
  4. Nutsthe original

Fit is the average pairing score against sugar, corn, syrup, egg, vanilla. Candidates are from the same food group and used in at least 100 recipes.

“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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