Immediately after baking these I would have given them 4 stars, but after cooling they're so good they get 5! Yes, a little messy when cooking, so definitely use a silpat when baking. The marshmallows can cook out of the edges of the cookies leaving a sticky mess. I wouldn't even bother with greased cookie sheets. With a silpat, not a problem at all. The marshmallows don't add a ton of flavor, but they do add a chewiness when cooled that's really yummy. I used all butter rather than shortening. Thanks for sharing the recipe!
These cookies have a good taste but I didn't get enough of the marshmallow taste to justify the mess they while baking. They aren't a very pretty cookie but the taste was that of chocolate chip cookies.