Butterscotch Meringue Pie

Directions

1. 1
   Combine sugars with flour in a heavy saucepan.
2. 2
   Add hot milk gradually.
3. 3
   Add salt and cook over low heat, stirring constantly, to make a smooth mixture.
4. 4
   Continue cooking, stirring occasionally, 15 minutes, until thickened.
5. 5
   Pour some hot mixture into the egg yolks, stirring constantly.
6. 6
   Pour back into the pan; mix well and cook 3 minutes longer.
7. 7
   Add butter, stirring to melt.
8. 8
   Cool.
9. 9
   Add vanilla and pour into baked crust.