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

Combine sugar, eggs, vinegar, flour (or cornstarch), 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 baked pie shell. If desired, pie may be topped with frosting or whipped cream or Cool Whip.