This is my personal rendition on a favorite from Quebec. The addition of pumpkin to ordinary mashed potatoes gives them an nice earthiness that goes well with roasted poultry or other autumnal fare. I have not tried it with canned pumpkin but will experiment eventually. Though I don't cook much with butter, you should feel free to add some more to suit your taste.
I have fond memories of making peanut butter balls with my mom and sister every holiday season. The women in my family are all big peanut butter and chocolate fans, so it seems like a natural holiday dessert to splurge