01 - Preheat oven to 350°F (175°C). Grease and line an 8x8-inch baking pan with parchment paper.
02 - In a large mixing bowl, whisk together melted butter, granulated sugar, and strawberry puree until thoroughly combined.
03 - Add eggs and vanilla extract to the bowl and whisk until smooth.
04 - In a separate bowl, whisk together flour, baking powder, and salt.
05 - Gently fold the dry ingredients into the wet mixture, mixing until just incorporated. Avoid over-mixing.
06 - Pour the batter into the prepared baking pan and smooth the top with a spatula.
07 - Bake for 22–25 minutes or until the edges are set and a toothpick inserted in the center emerges with a few moist crumbs.
08 - Allow brownies to cool completely in the pan.
09 - In a small bowl, whisk powdered sugar with strawberry puree and lemon juice (if using) until smooth and pourable.
10 - Spread the glaze evenly over cooled brownies. Let set for 15 minutes, then cut into squares and serve.