01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a large bowl, whisk together flour, baking soda, salt, ginger, cinnamon, cloves, and nutmeg.
03 - Using an electric mixer, cream unsalted butter and brown sugar until light and fluffy. Incorporate molasses and egg, mixing until smooth.
04 - Slowly add dry ingredients to the wet mixture, stirring until a firm dough forms. Divide dough in half, wrap in plastic, and refrigerate for 30 minutes.
05 - On a lightly floured surface, roll dough to 1/4 inch thickness. Using templates, cut out two walls, two roof panels, and two end walls featuring doors and windows. Transfer to prepared baking sheets.
06 - Bake for 15 to 20 minutes until edges are firm. Remove from oven and allow to cool completely on wire racks.
07 - In a clean bowl, beat egg whites until frothy. Add cream of tartar, then gradually mix in powdered sugar until stiff peaks form. Tint portions with food coloring as desired.
08 - Pipe royal icing along edges of walls and press pieces together, holding until set. Repeat for roof panels. Allow structure to dry for at least one hour before decorating.
09 - Attach candies, sprinkles, and shredded coconut using royal icing as adhesive to create festive designs.