Preheat oven to 350 Degrees.
Spray 9 x 12 baking pan with cooking spray and set aside.
Pour dry cake mix into mixing bowl.
Add melted butter.
Add two beaten eggs.
Mix those ingredients well.
Fold in chocolate chips.
Pour into prepared baking pan and spread out with a rubber spatula.
Bake at 350 degrees for 18-25 minutes until light golden brown. (Don't overbake.)
ENJOY!!