Butterscotch Pie

Directions

1. 1
   Combine sugar, flour and salt in top of a double boiler.
2. 2
   Heat milk and slowly stir in flour and sugar. Cook over boiling water until mixture begins to thicken.
3. 3
   Beat egg yolks in small bowl and stir 1 cup of hot mixture into eggs so the eggs do not scramble.
4. 4
   Stir egg mixture to double boiler and add butter. Cook until thick and pour into shell.
5. 5
   Serve with whipped cream if desired.