Good-Cooking - Black Raspberry Sheet Cake

Ingredients

• 3 cups all-purpose flour
• 3 teaspoons baking powder
• 1 teaspoon salt
• 1/2 cup granulated sugar
• 1 cup margarine
• 3 egg yolks, beaten
• 1/2 cup milk
• 1 teaspoon vanilla extract
• 1 (21 ounce) can black raspberry pie filling or cherry pie filling
• 1/2 cup butter or margarine
• 1/2 cup shortening
• 8 ounces cream cheese
• 1 pound confectioners' sugar
• Dash of salt
• 1 pint Marshmallow Creme
• 1 cup shredded coconut