In stand mixer beat butter and sugars until well combined.
Beat in eggs, vanilla and butterscotch topping until well combined.
In large bowl mix the flour, oats, baking soda and salt. Slowly add to wet ingredients along with the chocolate chips until just combined.
Scoop about 1/4 Cup dough into muffin top pans that have been sprayed with cooking spray. Flatten with palm of your hand then top with 5-7 M&M’s per cookie.
Bake for 11-13 minutes or until cooked through and golden around edges.
Remove from oven and loosen edges of cookies while warm so they will be easy to remove. Let cool for 5 minutes then transfer to a cooling rack.