Make this! Make the houses! Have fun!
What you need
3 large egg whites
1/2 tsp. cream of tartar OR 1 tsp. baking powder
4 3/4 cup powdered sugar
Whip the egg whites and tartar or baking powder together in your mixer on medium high till mixed fairly well. Start adding your sugar a bit at a time. Once it's all in there, mix on high 4-5 minutes. It'll be really whipped looking and beautiful white.
Makes enough for 1 house and all the decorations on it. I made two batches for these guys.