Recipe Apple Cake with Buttermilk Sauce

Ingredients
3 cups all-purpose flour
1 teaspoon baking soda
1/2 teaspoon salt
1 teaspoon ground cinnamon
3 eggs
2 cups sugar
1 1/4 cups vegetable oil
1 teaspoon vanilla extract
1/4 cup orange juice
2 cups chopped unpeeled apples
1 cup chopped walnuts
1 cup flaked coconut
BUTTERMILK SAUCE:
1 cup sugar
1/2 cup butter or margarine
1/2 teaspoon baking soda
1/2 cup buttermilk
Whipped cream

Directions
Combine flour, baking soda, salt and cinnamon; set aside. In a large mixing bowl, beat eggs. Add sugar, oil, vanilla and orange juice. On low speed, blend in flour mixture. Fold in apple, walnuts and coconut. Pour into a greased and floured 10-in. tube pan. Bake at 325 degrees F for 1-1/4 hours or until the cake tests done. Invert cake onto a large plate or platter. Deeply puncture the top of the warm cake with a skewer or pick.
In a small saucepan, bring all sauce ingredients to a boil, stirring frequently. Immediately spoon 1-1/4 cups of sauce slowly over the top of the cake, then pour the remainder down the sides. Cool. Serve with whipped cream if desired.