Birthday Blondies are easy but delicious dessert cake bars that are full of white cake mix, white chocolate chips, Golden Oreos, and lots of colorful sprinkles.
Preheat oven to 350°F.
In a large bowl combine the cake mix, eggs, vegetable oil, and milk and blend well. (Add more milk if the mixture is too thick.)
Add the sprinkles, white chocolate chips, and crushed Oreos.
Pour the mixture into a greased 8x8-inch baking pan.
Bake for 20-22 minutes.
Let the bars chill in the refrigerator for about 45 minutes before cutting and serving.