Cream together shortening and milk for about 3 minutes, (it will
look like small curd cottage cheese.) Add in vanilla.
in a separate bowl combine flour, sugar, baking powder and salt.
Add flour, one third at a time to the milk mixture, blending well
after each addition.
Lastly, add in egg whites, beating just until all combined.
Pour batter into a greased and floured (do not use a spray) 10 inch
cast iron skillet.
Bake in a preheated 350 degree oven for 40-45 minutes, using a
toothpick inserted in the center to test for doneness.
Let cool on wire rack for at least 45 minutes before serving, lightly
dust with powdered sugar if desired.
You can also bake this in 10 inch casserole dish or a 10 inch baking