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