add eggs and sour cream; mix well. Sift flour, baking powdr and baking soda. Add to butter mixture along with vanilla and beat well. Spread half the mxiture into a buttered 10 x 14 inch baking pan. Combine apples and cinnamon, spoon over batter in pan. Spread remaining batter over apples. Sprinkle topping mixture over batter. Bake one hour or until cake is golden brown. To make topping: Combine ingredients and mix well. ----