01 - Preheat the oven to 350°F. Line two large baking sheets with parchment paper.
02 - In a large bowl, cream the softened butter and dark brown sugar together until light and fluffy.
03 - Beat in golden syrup or molasses and eggs until the mixture is well combined.
04 - In a separate bowl, whisk together flour, ground ginger, cinnamon, cloves, baking soda, and salt.
05 - Gradually add the dry ingredients into the wet ingredients, mixing until a firm dough forms.
06 - Divide the dough in half, wrap each portion in plastic wrap, and refrigerate for at least 30 minutes.
07 - On a floured surface, roll out the dough to approximately 1/5 inch thickness. Use paper templates to cut out house pieces (two walls, two roof panels, and two gables).
08 - Transfer pieces to the prepared baking sheets, spacing them apart. Bake for 12 to 15 minutes until edges are firm and lightly browned. Allow to cool completely before assembly.
09 - Beat egg whites until frothy. Gradually add sifted powdered sugar and lemon juice, beating until the icing is thick and glossy.
10 - Fill a piping bag with royal icing and pipe along the edges of each piece. Attach the walls first, then secure the roof panels. Support with cans or jars while the icing sets, approximately 30 minutes.
11 - Use remaining royal icing to affix candies and decorations as desired. Optionally, sprinkle desiccated coconut for a snow effect.