1 c. sugar
2 eggs
2 tbsp. vinegar
2 tbsp. flour (or corn starch)
1 c. water
1/2 tsp. lemon extract
Sm. lump butter

Combine sugar, eggs, vinegar, flour, and water in double boiler and cook until thick and smooth, stirring occasionally. Just before removing from heat stir in small lump of butter and lemon extract. Pour into pie shell. If desired, pie may be topped with whipped cream.