Sift the flour, baking powder, sugar and salt. Cut in the shortening; add the beaten egg to the milk and add to the dry ingredients to make a soft dough. Divide and smooth out lightly. Bake in greased deep layer tins in hot oven for 20-25 minutes. Split and spread between layers with crushed and sweetened berries. Cover the top with whipped cream and whole berries. Dust with powdered sugar and serve.