Monster Cookies

In a medium-sized bowl, whisk together the flour, baking powder and baking soda. Set aside.
In a medium-sized bowl if using a handheld mixer or in the bowl of a stand mixer fitted with the paddle attachment, beat together the unsalted butter, brown sugar, and granulated sugar on medium-high speed until light and fluffy. About 2-3 minutes. Add the peanut butter and beat on medium speed until well combined.
Add the eggs and vanilla extract and mix on low speed until combined, scraping down the sides and bottom of the bowl if necessary.
Add the all purpose flour, baking powder and baking soda and mix on low speed until a dough forms. Add the oats and fold until evenly incorporated throughout the dough. Add the chocolate chips and M&Ms and fold until evenly incorporated. Cover & chill the dough for 1-2 hours.
Once the dough is almost done chilling, preheat your oven to 375 degrees Fahrenheit (191 degrees Celsius) and line a baking sheet with parchment paper. Roll the dough into large balls (approximately 4 tablespoons) and place them 3-4 inches apart on the baking sheet.
Bake for 14-15 minutes until the cookies are set and golden brown on the edges. Let cool on the pan for 5 minutes, then transfer to a wire rack to cool completely or enjoy slightly warm.