1 (9-inch) pie shell, unbaked
1/2 cup butter or margarine, melted
1 1/2 cups granulated sugar
1 teaspoon vanilla extract
Pinch of salt
3/4 tablespoon vinegar
Prepare unbaked pie shell. Mix butter and sugar and simmer slowly, stirring, for 5 minutes.
Remove from heat and let cool slightly, stirring constantly.
Add eggs, one at a time, beating well. Add vanilla extract, salt and vinegar; mix well.
Pour filling into pie shell and bake at 400 degrees F for 15 minutes; reduce heat to 350 degrees F and bake for 20 to 30 minutes. Shake pie gently. It is done when center quivers slightly.
Notes: Do not try to double recipe. Pie keeps well in the refrigerator overnight. Can freeze and reheat. Pie may be cut in slivers for finger desserts.