Brown-Butter Nectarine Blondie Bars

Blondies trade cocoa for brown sugar’s golden caramel note, and brown butter pushes that nuttiness further. Ripe nectarines and white chocolate keep these portable summer bars juicy, bakery-soft, and lightly crisp on top.

Serves 9 · 20 min prep · 35 min cook

Estimate for one serving

• 340 cal
• 4g protein
• 46g carbs
• 16g fat
• 2g fiber

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Ingredients

• 3/4 cup unsalted butter
• 1 cup packed light brown sugar
• 1/4 cup granulated sugar
• 1 large egg
• 1 egg yolk
• 2 tsp vanilla extract
• 1 1/4 cups all-purpose flour
• 3/4 tsp baking powder
• 1/2 tsp kosher salt
• 2 medium ripe nectarines
• 1/2 cup white chocolate chips
• 1 tbsp for sprinkling turbinado sugar

Instructions

1. 1Preheat oven to 350°F. Line an 8-inch square baking pan with parchment paper, leaving overhang on two sides.
2. 2In a light-colored saucepan melt the butter over medium heat and continue cooking, swirling frequently, until the foam subsides and brown bits form on the bottom and the aroma turns nutty, 5 to 7 minutes. Pour into a large mixing bowl and cool 5 minutes.
3. 3Whisk both sugars into the warm brown butter until smooth and glossy. Add the whole egg, egg yolk, and vanilla; whisk vigorously for a full minute until the mixture lightens slightly.
4. 4In a separate bowl stir together the flour, baking powder, and salt. Fold the dry ingredients into the butter mixture just until no flour streaks remain.
5. 5Pit and dice the nectarines into 1/2-inch pieces. Gently fold most of the diced fruit and all the white chocolate chips into the batter, reserving fruit for the top.
6. 6Spread the thick batter evenly into the prepared pan. Press the reserved nectarine pieces into the surface and sprinkle with turbinado sugar for crunch.
7. 7Bake until the edges are set and golden, the center is just barely firm, and a toothpick inserted near the middle comes out with a few moist crumbs, 28 to 32 minutes.
8. 8Cool completely in the pan on a wire rack at least 1 hour so the bars firm up. Lift out with the parchment and cut into 9 neat squares with a sharp knife.