01 - Preheat the oven to 350°F. Line an 8x8-inch baking pan with parchment paper, leaving overhang for easy removal.
02 - In a small bowl, mash the diced strawberries with a fork until juicy but still chunky. Set aside.
03 - In a large bowl, whisk together the melted butter and sugar until well combined. Add eggs and vanilla, whisking until smooth.
04 - Sift in the flour, cocoa powder, and salt. Fold gently until just combined—do not overmix.
05 - Fold in the mashed strawberries.
06 - Pour the batter into the prepared pan, smoothing the top with a spatula.
07 - Bake for 28–32 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
08 - Let the brownies cool completely in the pan.
09 - For the optional glaze: Puree the strawberries, then whisk together with powdered sugar and lemon juice until smooth. Drizzle over cooled brownies.
10 - Cut into squares and serve.