Step 1

Preheat oven to 350 degrees.

Step 2

Spray a 11x9 baking pan with nonstick spray.

Step 3

Combine cake mix, vegetable oil, egg, and milk into a bowl. Mix with hand mixer.

Step 4

Add sprinkles and white chocolate chips, continue to mix until all combined.

Step 5

Spoon batter from bowl into baking pan, sprinkle a few more rainbow sprinkles on top.

Step 6

Bake 25-30 minutes until your edges are slightly brown.  Mine take 26 minutes to be exact.

Step 7

Since the brownies are very fudgy, please allow them to cool completely or they will fall apart! :)  After cooling, cut into brownie square and enjoy!