6 egg whites
1/4 tsp. salt
2 c. sugar
1 tsp. vinegar
1/2 tsp. baking powder
1 tsp. vanilla

Ingredients should be at room temperature. Beat egg whites and salt for 15 minutes, using high speed of electric mixer. Gradually add sugar, beating constantly. Beat another 15 minutes, using high speed. Add vinegar, baking powder, and vanilla. Blend. Pile into buttered 9 inch spring form pan. Bake 1 hour at 250 degrees.