It's not from a Better Homes and Gardens cookbook, but I googled "marshmallow pumpkin pie" and found this as the first result. If it's not what you're looking for, I'll look at some of the other results I got.
Happy Anniversary, @Cooking Goddess! Hope it was a good one.
I had pizza and wings at a co-workers house last night. Doing "Friendsgiving" with them and other co-workers today. Getting together with cousins and other family members after work tomorrow.