Spray bottom and sides of 13x9-inch (3-quart) baking dish or pan with cooking spray. Set aside.
Step
2
In Dutch oven, heat marshmallow creme and butter over medium heat about 5 minutes, stirring constantly. Remove from heat.
Step
3
Add cereal; mix well.
Step
4
Spread mixture in baking dish. Using waxed paper or spatula sprayed with cooking spray, firmly press mixture evenly into baking dish. Cool before cutting. For bars, cut into 4 rows by 3 rows.
Recipe can easily be doubled or tripled.
Crush cereal slightly beforehand for smaller-sized bars.
Substitute 1 bag (10 oz) marshmallows for the marshmallow creme.
