Sweet Potato Sheet Cake - Preheat the oven to 350 degrees fahrenheit. Web whisk together cake mix, sweet potatoes, eggs, milk, and oil in a bowl. Prepare oven and cake pans: In another bowl, whisk flour, baking soda, spices and salt; Spread evenly into the prepared pan. Grease or spray a 13×9 inch pan. Preheat oven to 350°f with oven rack in center of oven. In a large bowl, beat eggs, sugar, oil and vanilla until well blended. Squeeze orange to get 1/3 to 1/2. Bake in the preheated oven until a toothpick inserted near the center.
In another bowl, whisk flour, baking soda, spices and salt; In a large bowl, beat eggs, sugar, oil and vanilla until well blended. Preheat the oven to 350 degrees fahrenheit. Whisk well and set aside. Mix the flour, baking powder, baking soda, salt and spices in a large bowl. Web whisk together cake mix, sweet potatoes, eggs, milk, and oil in a bowl. Preheat oven to 350°f with oven rack in center of oven. Bake in the preheated oven until a toothpick inserted near the center. Grate peel from orange to get about 1 1/2 tablespoons; Spread evenly into the prepared pan. Prepare oven and cake pans: Stir in 3/4 cup nuts; Grease or spray a 13×9 inch pan. Squeeze orange to get 1/3 to 1/2.