Put yellow cake mix in mixing bowl. DO NOT FOLLOW THE DIRECTIONS ON THE CAKE BOX. Add 2 extra large eggs, 1 stick of melted butter in microwave about 35 seconds, and 1/2 tsp. pure vanilla extract. Mix together in mixer. Batter will have a very most feel to it. Take cake batter and spread evenly through 9 x 13 pan so it evenly covers the bottom of the pan.