Combine cereal and cranberries in a large greased bowl.
In large microwave-safe bowl, combine marshmallows and butter and microwave on high for 1 minute. Immediately stir until smooth.
Pour over cereal mixture. Toss until cereal is evenly coated.
Turn into greased 9x13 baking pan and press evenly.
Cover and refrigerate until ready to serve.
Notes
You can use any kind of dried fruit (cranraisins, blueberries, raisins, etc.). Do not overcook marshmallows and butter. You can line baking dish with aluminum foil and grease if desired.