Preparation Steps

• Preheat the oven to 350°F (175°C). Grease and flour a 9x13 inch pan.
• In a bowl, mix together flour, baking powder, baking soda, and salt. Set aside.
• In another bowl, cream butter and sugar until light and fluffy. Add eggs one at a time, beating well with each addition.
• Stir in vanilla. Add the dry ingredients alternately with sour cream to the creamed mixture, mixing well after each addition.
• Fold in the apple slices. Pour into the prepared pan.
• Bake in the preheated oven for 45 minutes or until a toothpick inserted into the center of the cake comes out clean.
• Let cool in the pan for 10 minutes before turning out onto a wire rack to cool completely.