Maybe, but remember, this is an appetizer for a party that you'd eat just a bit anyway. You're dipping the ginger snaps into the dip- so you're not getting THAT much! Personally, I think it needs the confectioners sugar to give it the right consistency. But if anyone makes it with an alternative I'd love to hear how it turns out.
Also, I love to scoop out a small pumpkin and serve the dip in that- just for fun.