Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓
Walnut Squares
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.
Prepare the batter
Preheat the oven to 350°F (175°C).
In a large bowl, mix together the brown sugar and eggs until well combined.
Stir in the ground walnuts, bread flour, vanilla extract, salt, and baking soda until smooth.
Bake and finish
Pour the batter into a square shallow baking tin.
Bake for about 25-30 minutes or until a toothpick inserted in the center comes out clean.
Allow to cool completely before cutting into squares.
Frost as desired.
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.
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Sugar + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
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Walnut + vanillatop 10% of all pairsSmell alikestrongCooked together2,730 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Walnut + flourtop 12% of all pairsSmell alikemoderateCooked together5,873 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + vanillatop 12% of all pairsSmell alikemoderateCooked together19,241 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Egg + breadtop 13% of all pairsSmell alikemoderateCooked together22,662 recipes
Shared aroma: (e)-2-octenal (fatty, green).
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
- Eggs
- Bind the batter and set the structure as they bake.
- Brown sugar
- Adds sweetness, moisture and a caramel-like flavour.
- Ground walnuts
- Provide body, richness and nutty flavour to the squares.
- Bread flour
- Gives the batter structure so the squares hold their shape.
- Baking soda
- Reacts with the batter's acidity to help it rise and brown.
The step that matters
Judge doneness with a toothpick test. The batter is moist from sugar and ground walnuts, so underbaking leaves the center gooey while overbaking dries the squares. Checking that a toothpick in the center comes out clean confirms the centre has set.
Swap the walnut
How well each one fits the dish's main ingredients (sugar, egg, bread, flour, vanilla):
- Chestnutfits better
- Almondfits better
- Hazelnutfits better
- Walnutthe original
Fit is the average pairing score against sugar, egg, bread, flour, 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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