01 - Preheat the oven to 350°F. Line an 8x8-inch baking pan with parchment paper, allowing overhang for easy removal.
02 - In a large bowl, whisk together the melted butter and granulated sugar until smooth and well combined.
03 - Add the eggs, vanilla extract, lemon zest, and lemon juice to the butter mixture. Whisk until fully incorporated.
04 - In a separate bowl, whisk together the flour, baking powder, and salt until evenly distributed.
05 - Gradually fold the dry ingredients into the wet mixture until just incorporated. Take care not to overmix.
06 - Gently fold in the fresh raspberries, being careful to avoid crushing them excessively.
07 - Spread the batter evenly into the prepared pan and smooth the top. Bake for 28-32 minutes, until edges are golden and a toothpick inserted in the center comes out with moist crumbs.
08 - Allow the blondies to cool completely in the pan on a wire rack before glazing.
09 - Whisk together the powdered sugar, lemon juice, and lemon zest until smooth and pourable consistency is achieved.
10 - Drizzle the glaze evenly over the cooled blondies. Let set for at least 10 minutes, then cut into 16 squares and serve.