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Dessert

Peanut Bars

A sweet confection made from sugar, vinegar, water, butter, and peanuts.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Walnut and peanut match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 241 recipes. Both carry 2-undecenal, which smells sweet. The science ↓

Peanut Bars

Ingredients

Directions

Make the peanut mixture

  1. Combine sugar, vinegar, water, and butter in a saucepan.

  2. Boil the mixture until it drops from the spoon like wax.

  3. Stir in peanuts to your desired amount.

Set and mark

  1. Pour the mixture into buttered pans and mark into bars.

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. Walnut + peanuttop 6% of all pairs
    Smell alikestrong
    Cooked together241 recipes

    Shared aroma: 2-undecenal (sweet).

  2. Butter + walnuttop 15% of all pairs
    Smell alikemoderate
    Cooked together6,832 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

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

  4. Butter + peanuttop 16% of all pairs
    Smell alikemoderate
    Cooked together1,754 recipes

    Shared aroma: trans-2-decenal (waxy, orange).

  5. Vinegar + peanuttop 16% of all pairs
    Smell alikemoderate
    Cooked together443 recipes

    Shared aroma: acetic acid (sour, vinegar).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Granulated sugar
Forms the sweet base and, as it cooks, hardens into a brittle candy structure.
Vinegar
Adds acidity that helps keep the sugar from crystallising into a grainy texture.
Peanuts
Provide crunch and nutty flavour throughout the set bars.

The step that matters

Boiling until it drops like wax. The sugar must reach the right concentration to set firm once cooled. Stopping too early leaves the bars soft and sticky, while cooking too long makes them brittle or burnt. Watch the spoon test closely.

Swap the walnut

How well each one fits the dish's main ingredients (sugar, vinegar, butter, peanut):

  1. Sesamefits better
  2. Almondfits better
  3. Beansfits about as well
  4. Walnutthe original

Fit is the average pairing score against sugar, vinegar, butter, peanut. 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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