updated and adapted from Alison Parsons' Monster Cookies appearing in What’s Cooking in Our All-American City? II Junior Jam compiled by Rockingham Junior Woman’s Club, Rockingham, North Carolina 1985
In a large bowl or bowl of a stand mixer cream together the butter and sugars. Add the vanilla, eggs and peanut butter and beat until smooth. Add the flour, oats, baking soda, and salt and mix until a thick, uniform dough forms. Fold in the M&Ms and chips.
Use a 1/4 cup measuring cup and drop the 4 inches apart, onto the lined cookie sheets. Press the center of each cookie down slightly.
Bake for 14 minutes or until the edges are browned, the center is slightly soft but matte looking.
Carefully slide the cookies- with the parchment-- on to wire racks and cool completely.
Notes
These are big cookies! If you grease the pan instead of using the recommended parchment paper, allow them to cool in the pan for a couple minutes before transferring them to wire racks to cool competely.
I prefer to bake one pan at a time but if you bake two at a time, rotate them halfway through the total baking time.