20 sq. graham crackers, crushed fine
1/4 c. sugar
1/4 c. butter
1 lg. carton Cool Whip
2 (8 oz.) cartons lemon Chiffon yogurt

Blend first 3 ingredients together. Press firmly into 9 inch pie pan. Bake at 375 degrees for 8 minutes. Cool. Fold together yogurt and Cool Whip and heap into cooled pie crust. Refrigerate.