Step 1: In your stand mixer, combine the butter and both sugars until smooth.

Step 2: Add in the egg and vanilla until smooth.

Step 3: Add in the flour salt, baking powder, oats and peanut butter. Mix until combined.

Step 4: Add in the M&M's and mini chocolate chips.

Step 5: Form cookie dough balls (about 1-2 tbsp), place on a baking sheet and bake for 12 minutes at 350 degrees.