01 -
Set your oven to 350°F. Lightly coat a 9x13-inch dish with cooking spray and place it aside.
02 -
Stir together cake mix, eggs, oil, and vanilla in a bowl. Once smooth, gently mix in the pastel M&Ms and chocolate chips.
03 -
Evenly press the mixture into your greased dish.
04 -
Bake for 20-25 minutes. Let them cool all the way down before cutting them into squares and enjoying.