crush crackers coarsely and add walnuts. Beat the egg whites and gradually add the sugar, baking powder and vanilla. Mix with the crackers and nuts and spread in a pie plate. Bake 25 min. in 350 oven. Cover with whipped cream and top with grated sweet chocolate or Hershey bar. Best if cream is put on 1/2 day before serving, also good second day. Important: Crust will fall when cool, which is what it should do to hold the cream. Sure is good.