I made this as directed, and it was really easy and everyone liked it. It did fill my mixer to the brim, but I worked it out ok. Very very sweet, but good. I didn't add the marshmallows and I really think they are unnecessary. I am very grateful for a good recipe for all the cans of sweet potatoes in my pantry.
My DH loves sweet potato's. I didn't use can sweet potato's, I baked some and put them in the casserole dish, I didn't mash them, I sliced them up. I put the other ingredients on top and baked. I made this for dinner tonight and I have already tasted it. It was really good. I will be making this again.