Mix sugar, flour, and shortening until lumpy. Do not mix until creamy. Take
out 1 cup for topping. Dissolve soda in hot coffee and add to the flour
mixture. Also, add egg and vanilla. Spread on sheet pan 9x12x2 inch and
sprinkle on top.
This is a thin batter. Bake at 325-350 degrees for approximately 30 minutes.
Sprinkle with powdered sugar after baked