Butterscotch Pie

1 egg
1 cupful dark brown sugar
1 cupful milk
3 tablespoonfuls flour
2 tablespoonfuls Crisco
3 tablespoonfuls water
1/4 teaspoonful salt
1 tablespoonful powdered sugar
1 baked crust
1 teaspoonful vanilla extract

Put yolk of egg into saucepan, add brown sugar, flour, milk, water, Crisco, salt, and vanilla. Stir over fire until it thickens and comes to boiling point. Pour into baked pie shell. Beat up white of egg, then beat powdered sugar into it. Spread on top of pie and brown lightly in oven.

Sufficient for one pie.