Monster cookies are slightly crisp on the outside, and soft and chewy in the center. They are loaded with peanut butter, oats, M&M candies, AND chocolate chips! Big monster cookies win every time!
Prep Time15 minutesmins
Cook Time11 minutesmins
Total Time26 minutesmins
Course: Dessert
Cuisine: American
Keyword: m&m cookies, monster cookies, peanut butter oatmeal cookies
Preheat the oven to 350 degrees Fahrenheit and line 2 baking sheets with parchment paper.
Use a hand mixer or a stand mixer fitted with a paddle attachment to beat the butter, sugar, and brown sugar together on medium-high speed for 3-4, until light and fluffy.
Add the peanut butter and mix until combined. Add the egg and vanilla and mix again until combined. Scrape down the sides and bottom of the bowl as needed to make sure everything is fully incorporated.
In a medium bowl whisk together the flour, oats, salt, baking powder, and baking soda.
Add the dry ingredients to the wet mixture and mix until just combined. Stir in M&Ms and chocolate chips by hand.
Use a medium-sized cookie scoop to scoop the dough onto the prepared baking sheets, leaving at least 2 inches between them.
Bake for 9-11 minutes but do not overbake them! They will look just set on the edges and a little doughy in the center.
Remove them from the oven and allow them to cool on the pan for 5 minutes before transferring to a cooling rack.
Notes
Updated on April 30, 2024Originally Posted on May 08, 2019