These Monster Cookie Bars are thick, chewy, ultra ooey-gooey, and packed with peanut butter, oats, M&Ms, and three types of chocolate!
![Avatar](https://cdn.statically.io/img/i.pinimg.com/140x140_RS/ce/cb/57/cecb574a08da95adbe39434ea94e0c2f.jpg)
Lisa Hovey