Line a 13 x 9-inch baking dish with foil so that foil extends about 2 inches over sides of dish; spray with cooking spray.
In a large saucepot, melt marshmallows and butter over medium-low heat; remove from heat, and fold in cereal and candy. Firmly press marshmallow mixture into even layer in prepared dish; cover and refrigerate 2 hours.
Using overhanging sides of foil, transfer marshmallow treat bar to cutting board and remove foil; cut into 16 bars.
0 servings