Preheat oven to 350 degrees.
Make brownies from brownie boxed mix instructions by adding malted milk balls into the brownies for an 8x8 or 9x9 pan or make these scrumptious milk chocolate brownies.
To make homemade brownies - Prepare an 8x8 or 9x9 pan, lining pan with parchment paper or aluminum foil, then lightly spray with non-stick cooking spray.
Melt butter in saucepan on lowest setting until melted.
Add chocolate chips to melted butter, whisking until melted and set aside.
In a large mixing bowl, use a large whisk, lightly beat the eggs.
Place the sugars and salt in a small mixing bowl, add eggs and whisk until just incorporated.
Whisk the melted chocolate, then add into egg mixture and whisk until combined. Whisk in vanilla.
Whisk together the flour, baking powder, and cocoa powder together in a small bowl.
Sift dry ingredients over batter and stir in with silicone spatula until just combined.
Fold in chopped Whoppers and pour into pan, spreading out with spatula.
Bake for 25 - 35 minutes depending on size pan. Check center doneness by inserting a toothpick until it comes out clean.
Transfer pan to cooling and rack and let cool before frosting. Place in fridge to speed up process, 15 minutes after taking out of oven. (Brownies and cakes are easiest to frost when refrigerated and are cold.)