1. Melt butter in a large saucepan over low heat. 2. Add marshmallows, and cook, stirring constantly, 4 to 5 minutes or until melted and smooth. Remove from heat. 3. Stir in cereal and 1 cup cranberries until well coated. 4. Press mixture into a 13- x 9-inch baking dish coated with cooking spray. (This is a great step for the kids to do.) 5. Chop remaining ¼ cup cranberries and sprinkle on top. 6. Let stand 10 to 15 minutes or until firm. Cut into 24 bars.