These patriotic monster cookies are the perfect treat to make for friends and family during the holidays this summer. They are soft and chewy in the center and crunchy on the outside and are packed with mix-ins!
Preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper or silicone mats.
In a large mixing bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract. Mix in the peanut butter until combined.
½ cup unsalted butter, ¾ cup brown sugar, ½ cup granulated sugar, 2 large eggs, 1 & ½ teaspoon vanilla extract, 1 ½ cups creamy peanut butter
Add the flour, baking soda, salt, and old-fashioned oats to the bowl. Mix until evenly incorporated into the dough.
½ cup all-purpose flour, ½ teaspoon baking soda, ½ teaspoon salt, 2 ½ cups old-fashioned oats
Fold in the chocolate chips, peanut butter chips, and M&M's until evenly distributed throughout the dough.
⅓ cup chocolate chips, ⅓ cup peanut butter chips, ½ cup M&M's
Using a cookie scoop or spoon, drop rounded balls of dough onto the prepared baking sheets, spacing them about 2 inches apart. Gently flatten to about 1 inch in thickness and press a few extra m&m's on top of each cookie for decoration if you'd like. Each scoop has about 2 & ½ tablespoons of cookie dough.
Bake in the preheated oven for 9-10 minutes or until the edges are golden brown. The centers may still appear slightly undercooked, but they will set as they cool. Allow the cookies to cool on the baking sheets for 5 minutes, then transfer them to a wire rack to cool completely.
Notes
These cookies can be stored in an airtight container for up to 1 week. You can also freeze the cookies in a freezer-safe container for up to 3 months.