Attach 1 whole graham with white frosting to each side of roof for base. Beginning at bottom, attach 3 snowflake-shaped crackers with white frosting, allowing crackers to overhang edge. Repeat 4 more rows of crackers, trimming as needed to fit. Repeat for second side of roof. Mix moss green food color paste into some white frosting.
Pipe trim on house front, door and windows as pictured.
Attach 3 pineapple candies to each side of house front with frosting as pictured. Attach second layer of pineapple candies on top of first. Repeat with back of house. Pipe white frosting around roof tiles and top of roof peak as pictured. Stand remaining pineapple candies along roof peak.