Divide your M&Ms into 3 bowls: ¾ cup, ½ cup, and ¼ cup (does not have to be exact)
Preheat the oven to 350 and line a baking sheet with parchment paper.
In a medium sized mixing bowl cream together the butter, sugar, and brown sugar.
Add in the peanut butter, egg, and vanilla and mix until combined.
Stir in the flour, baking soda, and salt.
Fold in about ¾ cup of the M&Ms (save the rest for rolling & garnishing) and the peanut butter baking chips.
Use a two tablespoon cookie scoop to create cookie dough balls and roll the top half of the cookie dough ball in the ½ cup of M&Ms - using extra if needed)
Place the cookie dough balls about 2 ½” apart on the baking sheet and bake for 8-9 minutes.
Remove from the oven and garnish with sea salt and a few of the remaining M&Ms.
Let cool for 8 minutes on the baking sheet before transferring to a cooling rack.