My whole family loves S'mores but today it rained very hard and there was no way to safely use the grill, so we all came up with some ideas on pan s'mores and this won the most votes. So easy, even the young ones can help make it.
1Lightly spray a 9" x 13" pan w/ cooking spray and set aside. In a lg saucepan, over medium heat, melt butter and peanut butter until smooth.
2Stir in marshmallows. Keep stirring over medium heat until marshmallows are almost melted but not quite. Remove pan from heat.
3fold in cereal and chocolate chunks. With a spatula, press mix into pan. Sprinkle with dark chocolate chips. Cool. Once cool, cut into bars. Cover. You don't have to refrigerate these but if it's very hot where you are, you may want to.