4 c. Post Toasties, slightly crushed
1/3 c. brown sugar, firmly packed
1/2 tsp. cinnamon
1/3 c. butter, melted
1 (3 3/4 oz.) pkg. Jello vanilla instant pudding

Combine cereal with brown sugar, cinnamon and butter. Reserve 1/2 cup of this mixture. Press remaining cereal mix into bottom of an 8" square pan. Prepare pudding as directed for pie. Pour over cereal in pan. Top with reserved cereal mixture. Chill 1 hour. Serve with whipped topping if desired.