This is a super quick, easy and tasty treat. I saw this idea somewhere, not sure where.

Large marshmallows
Chocolate chips (I used milk chocolate)
Crumbs of cookies (I had some chocolate chip)

Melt the chocolate chips in a glass or metal bowl over simmering water or in the microwave.
Once melted dip the end of the marshmallow into the chocolate and then immediately into the cookie crumbs.  Let sit on wax paper until set up.

Tip:  My friend, Laurel, told me about keeping your marshmallows in the freezer to keep them fresh and not sticky.  I just tried this for the first time.  It was an added bonus for this recipe in that the chocolate set up pretty quick, but you have to dip in the crumbs right away before it sets.