Make topping first. Cream together Crisco, salt and sugar in a bowl. Beat egg lightly and add to first mixture. Add sour milk or buttermilk in which baking soda has been dissolved. Add flour which has baking powder added to the last of the flour. Mix thoroughly. Bake in 2 (8- or 9-inch) square pans which have been greased well at 400° for 20 minutes after topping with the following mixture: Mix well butter or oleo, flour, brown sugar and cinnamon. Nuts may be sprinkled over top, as may some cinnamon/sugar mixture.