This Monster Skillet Cookie is a thick, chewy peanut butter cookie packed with chocolate chips, oats, and mini M&M’s. In short it is everything you need and want right now.
In a bowl whisk together flour, soda, powder and salt. Set aside.
Cream butter and sugar only just until a smooth paste forms. This is critical for thick and chewy cookies.
Beat in the egg, scraping down the sides of the bowl and really making sure it is incorporated. Add the peanut butter and beat until smooth.
Reduce the speed to low and slowly add the dry ingredients a bit at a time. I never wait until it all incorporates before adding more, but you don’t want to overwhelm the batter either. Easy does it!
Once all the flour has mixed in, add the chocolate chips, oats and mini M&M’s.
Press it into a cast-iron skillet. If yours is nicely seasoned, you don’t even need to spray it. If you don’t know, just give it a little spritz with nonstick cooking spray.
Pop in preheated oven and bake until golden brown around the edges and the top. It will take 20-22 minutes.
Cool and then slice and enjoy. Or just gather your besties, pull it from the oven, and pile it high with ice cream and dig right in.