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Dessert

Rock Cookies

A sweet cookie with walnuts and raisins, flavored with cinnamon and baked at 300°F.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Why it works: Flour and raisin match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 9,075 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Rock Cookies

Ingredients

Directions

The book gives no oven temperature. The 300°F (150°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare

  1. Preheat the oven to 300°F (150°C).

Make the dough

  1. In a large bowl, mix the brown sugar and melted butter until combined.

  2. Add the beaten eggs, cinnamon, dissolved baking soda, and salt; mix well.

  3. Gradually stir in the flour, walnuts, and raisins until fully incorporated.

Bake

  1. Drop spoonfuls of the mixture onto a buttered baking pan, leaving space between each.

  2. Bake until golden brown.

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. Flour + raisintop 1% of all pairs
    Smell alikestrong
    Cooked together9,075 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Cinnamon + raisintop 1% of all pairs
    Smell alikemoderate
    Cooked together5,390 recipes

    Shared aroma: 1-octen-3-ol (mushroom, earthy).

  3. Cinnamon + walnuttop 6% of all pairs
    Smell alikestrong
    Cooked together2,147 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  4. Cinnamon + flourtop 9% of all pairs
    Smell alikemoderate
    Cooked together17,341 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Sugar + cinnamontop 10% of all pairs
    Smell alikelow
    Cooked together30,779 recipes

    Shared aroma: guaiacol (smoky, sweet).

Sugar and cinnamon barely smell alike, yet cooks put them together in 30,779 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

Flour
Provides the structure that holds the cookies together as they bake.
Eggs
Bind the dough and add richness and structure as they set.
Baking soda
Reacts with the sugar and heat to lift the cookies and help them brown.
Melted butter
Adds fat and moisture, giving the cookies a tender texture.
Light brown sugar
Adds sweetness and moisture, and helps the cookies brown and stay soft.

The step that matters

Bake until golden brown. The record gives no time, so the cook must judge doneness by colour. Baking too long dries the cookies, while underbaking leaves them doughy in the centre.

Swap the walnut

How well each one fits the dish's main ingredients (sugar, butter, egg, cinnamon, flour, raisin):

  1. Almondfits better
  2. Chestnutfits better
  3. Pistachiofits better
  4. Walnutthe original

Fit is the average pairing score against sugar, butter, egg, cinnamon, flour, raisin. 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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