In a large bowl, cream together the butter, sugars, and peanut butter until smooth.
Beat in the eggs, two at a time.
Stir in the corn syrup and vanilla.
Mix in baking soda and oats until well blended.
Stir in the Peanut Butter M&Ms and chocolate chips.
Use an ice cream scoop to put about 2 inch balls on a cookie sheet. If you like a flat cookie, flatten the dough slightly. If you'd like the cookie thick and rounded, just leave the dough in a ball.
Press extra candy pieces or chocolate chips in the tops of the cookies for a pretty look. This is optional.
Bake for 10 to 12 minutes at 350 degrees.
After cooling for a few minutes on the cookie sheet for 5 minutes, transfer them to wire racks to cool completely.
Store in an airtight container.
Notes
Be creative with what you put in your cookies to make your perfect "monster" cookie!The calories shown are based on the recipe making 72 cookies, with 1 serving being 1 cookie. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. **We are not dietitians and recommend you seek a nutritionist for exact nutritional information.**