6 egg whites
2 pounds confectioner's sugar
cream of tartar
1 large box of graham crackers made 10 houses. It takes 5 intact whole long graham crackers for 1 house. (there are 9 crackers per inner package. Allow a couple extra for breakage)
10 paper plates
A partner, this is a 4 hand job
Make a recipe of Royal Icing from the Betty Crocker red and white cookbook from about 1970.
3 egg whites, 1 pound confectioner's sugar, 1/2 tsp cream of tartar and 1 tsp vanilla. Beat in the kitchenaid with the whisk attachment for 7-10 minutes until thick and fluffy. I put it into a gallon ziploc bag with a corner cut out for the piping tip with the large opening.
You will need to make another recipe of icing and put it into quart bags, about 1/2 cup each, for the house creators to use for the "cement" for their candies. Squeeze the air out and wait to cut open until they are ready to use, then clip off a corner and just squeeze it out of the bag.
Cut open the inner packages of crackers and use a sharp knife to slice one into 2 sections. They slice more accurately than they break. Position the short end crackers so the seam line goes across rather than up and down. It will make your pieces fit a little better.