Cola Zucchini Cake

1 (18.25 ounce) box devil's food cake mix
1/2 cup cola beverage
3 large eggs
1/3 cup vegetable oil
1 1/2 cups grated zucchini, with peel
1 cup semisweet chocolate chips

Heat oven to 350 degrees F. Grease a 13 x 9-inch baking pan.

Empty cake mix into large bowl. Add cola, eggs and cooking oil. Beat on low until just moistened. Beat on medium for 2 minutes. Add zucchini. Stir. Turn into prepared pan. Sprinkle with chocolate chips. Bake for 35 to 40 minutes until wooden pick inserted in center comes out clean. Cool.