Sink Your Teeth Into These Thick & Chewy Monster Cookie Bars

👩‍🍳 Instructions

1. 1

   Preheat oven to 350°F (175°C). Line a 9x13-inch baking pan with parchment paper, leaving an overhang on the sides. Lightly grease the parchment paper.
2. 2

   In a medium bowl, whisk together the flour, rolled oats, baking soda, and salt. Set aside.
3. 3

   In a large mixing bowl, using an electric mixer, cream together the softened butter, granulated sugar, and light brown sugar until light and fluffy, about 2-3 minutes. Scrape down the sides of the bowl as needed.
4. 4

   Add the creamy peanut butter to the butter-sugar mixture and beat until well combined and smooth.
5. 5

   Beat in the eggs, one at a time, mixing well after each addition. Stir in the vanilla extract.
6. 6

   With the mixer on low speed, gradually add the dry ingredient mixture to the wet ingredients. Mix only until just combined; do not overmix.
7. 7

   Remove the bowl from the mixer. Gently fold in the semi-sweet chocolate chips and mini M&M's using a spatula until evenly distributed.
8. 8

   Transfer the cookie dough to the prepared baking pan. Press the dough evenly and firmly into the pan, ensuring it reaches all corners. If desired, press a few extra M&M's and chocolate chips onto the surface for presentation.
9. 9

   Bake for 28-32 minutes, or until the edges are lightly golden brown and the center appears set but still slightly soft. A toothpick inserted into the center should come out with moist crumbs.
10. 10

    Remove from the oven and place the pan on a wire rack to cool completely before lifting out of the pan using the parchment paper overhang and cutting into squares. Cooling completely is crucial for proper setting.