2 1/4 cups sifted cake flour
3 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
1 1/2 teaspoons ground cinnamon
1/2 teaspoon ground allspice
1/2 teaspoon ground ginger
1/2 cup butter
1 cup dark brown sugar
1 cup white sugar
2 eggs
3/4 cup buttermilk
3/4 cup mashed sweet potatoes
1/2 cup chopped golden raisins