Zucchini Cake

1 (18.25 ounce) box yellow cake mix
1/4 cup flour
3 eggs
1/2 cup vegetable oil
3/4 cup granulated sugar
2 teaspoons cinnamon
2 teaspoons vanilla extract
2 cups raw zucchini
1 cup chopped nuts

Mix all ingredients except nuts. Beat 2 minutes with electric mixer. Fold in nuts. Bake at 350 degrees F for 1 hour, checking at 45 to 50 minutes.