Preheat oven to 350 F (180C) and line a baking sheet with parchment paper.
In a large bowl, mix together the peanut butter, coconut oil, brown sugar, eggs and vanilla with a wooden spoon or a spatula until smooth and combined.
Add the oats, and baking soda and stir until combined, then add the m&ms and chocolate chips and stir until mixed. The batter will be wet, that's fine!
Scoop dough onto prepared baking sheets using cookie scoop or rounded tbsp, leaving 2 inches of space between each dough ball.
Bake for 10-12 minutes until cookies are golden brown on the edges and completely set. Cool completely before enjoying (or enjoy warm, no judgement here!).