Nancy Drew Blondies

Makes:16 to 36 squares, depending on how greedy you feel.
Prep time: | Total Time:

Recipe from: Hand Made Baking: Recipes to Warm the Heart, by yours truly.

The original Nancy Drew Blondies are only flecked with walnuts. In the instance you’d like to go that route, please read the variation note below. For those of that need more than that, go ahead and add milk chocolate chips and white chocolate chips into the batter (I always do)– the combination isn’t overwhelming and it makes for irresistible blondies. Feel free to chop chunks of white chocolate and milk chocolate from bars, if you prefer to use those instead of chips.

Variations: This recipe is a good base for any additions that fit your tastes, so feel free to experiment after you’ve made the original recipe once or twice. For example, if you’re not into white chocolate or milk chocolate, leave them out and increase the amount of toasted walnuts to 1 cup / 115 g. If you’re not into walnuts, feel free to use pecans or any kind of nut you feel might be appropriate. I’d avoid pistachios here, despite how much I adore them.

For those that prefer blondies that aren’t on the sweeter, more delicately flavored side of the street, feel free to go with a good dark chocolate– anything with about 54% to 70% cacao solids, I’d say.

If you’re into it, feel free to top these crackly-topped beauties with a little crunchy Maldon sea salt or some fleur de sel to add a little more oomph to the blondies (as if they could get any better!). Alternatively, you can increase the salt in the recipe to 1/2 teaspoon.

6 tablespoons /85g unsalted butter
1 cup / 200g packed light muscovado sugar or soft light brown sugar
1 1/2 teaspoons pure vanilla extract
1/4 teaspoon fine grain sea salt.
1 large egg, cold
1 cup / 120g whole-wheat pastry flour or all-purpose flour
1/2 cup/ 85g white chocolate chips
1/2 cup/ 85g milk chocolate chips
1/3 cup/ 35g walnuts, lightly toasted and roughly chopped (optional; see headnotes for variations)


Position a rack in the upper third of the oven.

Preheat the oven to 350ºF/ 180ºC. Line an 8-inch/20-cm square baking pan with parchment paper or aluminum foil, leaving an overhang around each side; this will help you get the blondies out of the pan with ease after they’ve baked.

In a medium saucepan, melt the butter over low heat. Remove the pan from the heat and with a wooden spoon or sturdy silicone spatula, mix in the brown sugar, vanilla, and salt until smooth and lump free. Quickly stir in the cold egg until well incorporated. Add the flour, white chocolate chips, milk chocolate chips, and walnuts (if using) all at once. Stir the mixture until just incorporated. Spread the batter evenly into the prepared pan.

Bake for 25 to 30 minutes, until golden, set in the middle, and a toothpick or cake tester plunged into the center comes out clean or with a few stray crumbs attached.

Allow the blondies to cool completely in the pan (I know, I know; try to wait a bit, though). Once cooled, lift the ends the parchment line and transfer the blondie block to a cutting board. Cut it into 15, 25, or 36 squares. I prefer to err on the side of 36, as these are quite rich, and they’re good for snacking at that size. The blondies will keep in an airtight container, at room temperature, for up to 5 days.

Notes: The secret to the moistness of these blondies is the cold egg. If you prefer a blondie that errs on the side of cakey, use a room-temperature egg and briefly beat it with a whisk or fork before adding it to the batter. Once the batter is ready for the oven, tag on a couple more minutes of baking time.