Preheat and prepare: Preheat oven to 350°F (175°C). Grease and line a 8x8 or 9x9 inch baking pan with parchment paper, leaving an overhang for easy removal.
Combine wet ingredients: In a large bowl, whisk together the melted butter, granulated sugar, eggs, and vanilla extract until well combined.
Combine dry ingredients: In a separate bowl, whisk together the flour, cocoa powder, and salt.
Combine wet and dry ingredients: Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined. Do not overmix.
Add strawberries: Gently fold in the chopped strawberries.
Bake: Pour the batter into the prepared baking pan and spread evenly. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with just a few moist crumbs attached. Be careful not to overbake, as this will result in dry brownies.
Cool: Let the brownies cool completely in the pan before cutting.
Make the glaze (optional): While the brownies are cooling, you can make the glaze. Whisk together the powdered sugar, milk, and vanilla extract until smooth and creamy. Adjust the amount of milk to achieve your desired consistency.
Drizzle with glaze (optional): Once the brownies are completely cooled, drizzle the glaze over the top. You can also add extra chopped strawberries for garnish.
Cut and serve: Cut the brownies into squares and serve.