In a large bowl, combine the pumpkin, vanilla, cinnamon, nutmeg, cloves and ginger. Prepare cake mix according to package directions. Fold a fourth of the batter into pumpkin mixture. Gently fold in the remaining batter. Gently spoon into an ungreased 10-inch tube pan. Cut through batter with a knife to remove air pockets. Bake on the lowest oven rack at 350 degrees for 38-44 minutes or until top is golden brown and cake springs back when lightly touched. Immediately invert pan onto a wire rack; cool completely, about 1 hour. Run a knife around sides of cake and remove to a serving plate. Garnish each slice with whipped topping.
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