Preheat your oven to 350°F (175°C).

In a mixing bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.

Mix in the peanut butter, eggs, and vanilla extract until well combined.

In a separate bowl, whisk together the rolled oats, flour, baking soda, and salt.

Gradually add the dry mixture to the wet mixture, stirring until just combined.

Gently fold in the chocolate chips and M&M's until evenly distributed.

Using a cookie scoop or tablespoon, drop dough onto lined baking sheets.

Bake for 10-12 minutes or until the edges are golden brown.

Let them cool on the baking sheet for a few minutes before transferring to a cooling rack.