Put 1 egg in measuring cup, fill on up with milk. Beat in bowl. Add:

2 tsp. vanilla
1 c. mashed potatoes (warm)
1 1/2 c. sugar
1/4 tsp. salt

Beat well. Sift together:

4 tsp. baking powder
4 c. flour

Add to mixture. Add 4 tablespoons melted shortening. Make a soft dough, roll out and bake in hot grease.