Combine egg, 1/2 cup sugar, milk, and shortening. Add 1 cup flour, sifted with salt and baking powder; mix well. Place in greased 8 x 8 pan. Sprinkle blueberries over kuchen dough.
Mix 3/4 cup flour and 1/2 cup sugar; cut in butter until crumbly. This is a streusel. Sprinkle over berries. Bake at 375 degrees for about 25 minutes or until it tests done.