Sweet Potato Pound Cake

1 cup butter
2 cups sugar
1½ cups mashed cooked sweet potatoes
4 eggs
3 cups flour
¼ teaspoon soda
½ teaspoon nutmeg
1 teaspoon cinnamon
1 teaspoon vanilla
½ cup chopped pecans
½ cup flaked coconut

Icing:
One (1 lb) box confectioner's sugar
Grated rind of one orange
Grated rind of one lemon
Juice of one lemon
Juice of one orange

Cake:
Cream butter and sugar; add sweet potatoes and beat until light and fluffy. Add eggs one at a time beating well after each. Combine dry ingredients and stir into creamed mixture; add vanilla, nuts and coconut. Pour mixture into greased 10" tube pan and bake at 350º for 1 hour 15 minutes or until cake tests done. Spread with icing while warm.

Icing:
Combine all ingredients, slowly adding enough orange juice to make spreading consistency.