Step 1

Preheat your oven to 350º F and line 2 large baking sheets with parchment paper. Set the baking sheets aside.

Step 2

In your standing mixer fitted with the paddle attachment, cream together the butter, brown sugar, and white sugar. Add the peanut butter and eggs and mix until well combined.

Step 3

Add the baking soda, vanilla, and oats and mix on medium speed until well combined. Fold in (by hand) the chocolate chips and M&Ms.

Step 4

Scoop dough into 1.5-2" dough balls (or roll by hand) and place the cookies about 2" apart on the baking sheet. Slightly flattened them, still leaving them in their rounded shape. Add one additional M&M to the top of each dough ball (optional).

Step 5

Bake the cookies for 10-11 minutes until cooked through (working in batches). The cookies are better slightly undercooked than overcooked, so watch the baking time carefully. Leave them on the baking sheet to cook. They will firm up as they cool.