Preheat oven to 375~. Grease and flour 2, 9x1 1/2" round cake pans. Put dry cake mix, butter, applesauce, eggs and cinnamon into large mixer bowl. Beat for 4 minutes at medium speed. Stir in black walnuts. Turn batter into pans and spread evenly. Bake for 30-35 minutes. Frost with Mocha Frosting. (see recipe)