When I was a kid, I remember making Graham Cracker "Gingerbread" Houses at a Holiday party. We took half pieces of graham crackers and stuck them to little milk cartons, like the ones you get at school, with regular frosting.
I wanted to try to recreate this (but without a pesky milk carton in the way). You can use whatever frosting you want! There is no wrong one to use :)
You can use pretty much anything you can find, but I will list exactly what I used. I will talk, in the steps, about what I think are good alternatives for what I used.
I mostly went with what I already had sitting around my kitchen, but you can really use anything you want to decorate your house. Here are some other suggestions to get you started.