Box Brownie Hacks - How To Make Box Brownies Better

4 Pre-heat oven to 325F and line an 8x8 metal baking pan with parchment paper.
0 Add the brownie mix to a large mixing bowl.
1 Pour in the chocolate milk, melted butter, vanilla extract & espresso powder and whisk gently to combine.
2 Next, add in the eggs and yolk whisking gently to combine.
3 Fold in chocolate chips or any solid add ins like marshmallows, pretzels or peanut butter cups.
5 Bake for 35-40 minutes at 325F or according to package instructions.