Spicy Pumpkin Sheet Cake
["4 eggs", "1 3/4 c. (16 oz.) can pumpkin", "1 c. sugar", "3/4 c. firmly packed brown sugar", "1 c. oil", "2 c. flour", "2 tsp. baking powder", "1 tsp. baking soda", "1 tsp. cinnamon", "1/2 tsp. ginger", "1/2 tsp. nutmeg", "1/2 tsp. salt", "3 oz. cream cheese", "1/4 c. butter", "1 tsp. vanilla", "2 c. powdered sugar"]
["Combine in small bowl.", "Beat until light and fluffy, then frost cake."]
["eggs", "pumpkin", "sugar", "brown sugar", "oil", "flour", "baking powder", "baking soda", "cinnamon", "ginger", "nutmeg", "salt", "cream cheese", "butter", "vanilla", "powdered sugar"]