These monster cookies are thick, chewy and intensely peanut butter. Big, bold, and bursting with flavor, this easy cookie has almost more mix-ins than dough!
In a large bowl, combine flour, baking soda, baking powder, and salt. Whisk to combine the ingredients. Ensure the leavening agents are evenly distributed and lump-free. Set aside.
Start creaming the butter in a bowl of a stand mixer fitted with a paddle attachment (or with an electric mixer). Beat the butter on medium-high until it is still cold but pliable. Add the sugars and mix on medium-high until combined and a paste forms. This is especially important if your butter is actually room temperature.
Add the egg and vanilla extract. Scrape down the sides of the bowl when needed. Add the peanut butter and beat until smooth.
Reduce the mixer to low and gradually add the mixed dry ingredients to the wet ingredients. I usually add the flour mixture in about 4-5 additions. To prevent overdevelopment of the gluten, I add the next bit of flour when the last one is almost fully incorporated.
Stir in the chocolate chips, quick oats, and m&m’s once the flour is fully incorporated. Mix until combined and fully distributed.
Roll the cookie dough 1 ½ inch balls, about 70g each or half the size of a tennis ball. You can also use a 2 oz cookie scoop. Yeah, really huge. That’s what’s up. Chill completely or bake immediately. This is the beauty here. They bake like a dream from frozen, but if you just cannot wait (feel that chocolate pb craving like woah), then preheat your ovens and pop ‘em in!
Preheat the oven to 350°F conventional or 325°F convection. Line your baking sheets with parchment paper.
Place chilled or frozen cookies 2 inches apart on the prepared baking sheets. Bake for 10-12 minutes or until golden brown and matte. At 325°F convection, mine baked for 13 minutes from the refrigerator, rotating after 8 minutes. They will take a solid 15 minutes from frozen.
Cool on the cookie sheet for 5 minutes before moving to a wire rack to cool completely. Or just enjoy. No judgement!
Notes
Yield – 13, 70g cookies Variations - Monster Skillet Cookie! This recipe also fits perfectly into a 8” cast iron skillet. Bake 20-22 minutes at 325°F.Technique – For the thickest, chewiest cookies, just barely cream the butter and sugars together. Storage –Store your baked cookies well-wrapped or in an airtight container for 3 days at room temperature or in the freezer for up to 2 months.