2/3 c. butter
14 oz. sweetened condensed milk
2 c. whipped topping
1/3 c. sugar
21 oz. can lemon pie filling
7 c. Rice or Corn Chex cereal, crushed to 3 c.
Lemon juice

Pat the cereal mixture into a 9 x 13 inch pan; reserve 1/3 cup of mixture for garnish. Bake at 300 degrees for 12 minutes; cool. Mix milk and lemon juice. Stir in pie filling. Pour over crust and top with 2 cups whipped topping and crumbs.