Sift flour and measure then sift together with the other dry ingredients. Beat the egg, then add the milk and melted shortening. Pour the wet into the dry then add the raw apples and mix well. Pour into a well greased 8-inch square pan. Mix together the streusel ingredients and sprinkle over the top of the batter. Bake at 400 about 25 to 30 minutes or until a toothpick inserted comes out clean. Serve the coffee cake with vanilla ice cream.