Here is the official link of where the recipe came from: S'more Ice Cream Cake
After reading the reviews, which are always helpful, a tip or 2:
1) Don't melt the chocolate too much. I did and it was way too hot which made the whipping stage take forever.
2) Instead of using the electric mixer for 3-5 minutes to make peaks, it takes about 10-15 minutes. Patience.
3) I put more marshmallows in; there just didn't seem to be enough!