Preheat the oven to 350F and line the bottom of the 8x8 baking dish with parchment paper.
Whisk together the melted butter, cocoa powder, and vanilla extract until smooth.
In a separate bowl, beat the eggs with the brown sugar until just combined.
Add the cocoa mixture to the egg mixture and stir until just combined.
Mix in the flour, followed by the strawberries and chocolate chips.
Bake the brownies at 350F for 35-40 minutes, or until a toothpick inserted into the center comes out clean.