Preparation Steps

• In the bowl of your stand mixer fitted with the paddle attachment, mix the butter, peanut butter, brown sugar, and granulated sugar together on medium speed for 2 minutes.
• Add in the eggs one at a time, vanilla extract, baking soda, and salt, and mix until smooth for 1 minute, scraping the sides of the bowl as necessary.
• Turn the mixer to low and add in the flour, mixing until combined.
• Slowly add in the oats and mix until incorporated.
• Stir in the chocolate chips, M&Ms, and other optional add-ins.
• Cover the bowl and refrigerate the dough for at least 2 hours.
• Preheat oven to 375°F. While the oven is preheating, remove the dough from the refrigerator to take the chill off.
• Line your baking sheet with parchment paper. Using a medium (2-tablespoon) cookie scoop, portion out the dough and place 2 inches apart on the baking sheet.
• Bake for 10 to 12 minutes, until lightly golden. Allow the cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.