1. Heat oven to 325 degrees F. In a large bowl, cream sugars, butter, peanut butter and corn syrup on high speed until well combined. Beat in eggs 1 at a time. Beat in vanilla extract.
2. In a separate bowl, mix together oats and baking soda. Stir into peanut butter mixture until combined. Mix in chocolate chips and M&M's.
3. Using a standard-size ice cream scoop, drop dough onto baking sheets (about 9 per sheet). Bake at 325 degrees F for 18 minutes or until lightly browned. Cool 2 minutes, then transfer cookies to a wire rack to cool completely.