Old Fashioned Potato Scones

11/2 cup all purpose flour
3 tsp. baking powder
1/4 tsp. salt
1/3 c. shortening
1 egg
1 cup cold mashed potatoes
2 tsp milk

combine flour baking powder and salt
Cut in shortening until mixture is fine. 
Beat egg, add potatoes and milk and combine thoroughly. 
Add to flour mixture. combine lightly with fork to make a soft dough. Turn onto floured surface and Knead for a few seconds.
Roll into 3/4" circle and cut into triangles(12)
place on greased baking sheet. brush with milk and sprinkle lightly with white sugar.
Bake 425 F. 12-15 minutes.