Vegetable cooking spray
All-purpose flour, for dusting pans
1 cup butter, softened
3 cups sugar
6 large eggs, separated
1 1/2 cups mashed cooked sweet potatoes
1 cup sour cream
1 tablespoon baking powder
1 teaspoon vanilla extract
1/2 teaspoon ground cinnamon
1/2 teaspoon ground ginger
1/4 teaspoon salt
1 cup chopped pecans
3 cups all-purpose flour
Coconut Filling, recipe follows
Caramel Frosting, recipe follows
1/4 cup sugar
2 tablespoons cornstarch
1/8 teaspoon salt
1 cup milk
1 large egg, lightly beaten
1/2 cup frozen grated coconut, thawed
1 teaspoon vanilla extract
2 (3-ounce) packages cream cheese, cut into cubes and softened
3/4 cup whipping cream
2 1/4 cups sugar
2/3 cup water
9 tablespoons butter, cut into 1/2-inch cubes