Preheat oven to 325°. Spray an 8x8 baking pan with non-stick cooking spray.
In a large mixing bowl, whisk together water, oil and egg until well combined. Add brownie mix and stir until well blended. Spread in to prepared pan.
Bake brownies 25 minutes until the brownies are starting to firm up in the middle. Scatter Milky Way Bites on top of the brownies. Bake 20 minutes more. Don't overbake, you want them to be fudgy.
Remove from oven and allow brownies to cool completely before cutting.
Notes
High altitude adjustments: add ¼ cup flour to brownie mix and an addition 2 tablespoons water