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.