Preheat the oven to 350 degrees F. Line a 9x13-inch baking pan with foil or parchment paper, spray with cooking spray, and set aside.
In another medium-sized bowl, whisk the melted butter, sugar, and vanilla extract together. Add the eggs, one at a time, whisking until each egg is well combined before adding another.
Spread the brownie batter in an even layer into the bottom of the prepared baking pan. Sprinkle the remaining 1/4 cups of berries and chocolate chips on top.
Bake for 28-33 minutes, or until a toothpick, when inserted into the center, comes out clean.