• Preheat your oven to 360°F (180°C).
• Sift the flour, cinnamon, and ginger into a large mixing bowl. Stir in the brown sugar until evenly combined.
• Pour in the melted vegan butter and mix everything with a wooden spoon or spatula until a thick dough forms.
• Split the dough into 4 parts - it’s easier to manage in smaller portions. Roll out the first part between two sheets of non-stick baking parchment to about ¼ inch (5mm) thickness.
• Place your gingerbread house template pieces on top, cut out the shapes, and transfer them to a baking sheet. Combine any dough scraps with the next portion and repeat until you’ve cut out two of each shape.
• Bake the gingerbread house parts at 360°F (180°C) for 8-9 minutes. Remove and let them cool completely - at least 1 hour, or overnight for best results.
• Roll out leftover dough and use cookie cutters to create stars, trees, gingerbread people, etc. Bake these for 8-9 minutes and cool completely.
• Once cooled, check your gingerbread pieces for uneven edges. Carefully trim them with a sharp knife to make sure everything fits together nicely.
• In a large bowl, whip the aquafaba with an electric mixer for 5-6 minutes until stiff peaks form. Add vanilla and gradually mix in the powdered sugar. You’re aiming for a thick, pipeable consistency - adjust with a little more sugar or a splash of water if needed.

Assemble the house

• Transfer your icing into a large piping bag with a round nozzle.
• Start with the back and one side wall. Pipe icing along the bottom of the back wall and carefully set it aside.
• Pipe icing along the bottom and one edge of a side wall, then stand both walls upright on your cake board with the edges touching. Gently press them together. Use tins, mugs, or jars to prop up the walls if needed while drying.
• Repeat with the second side wall and the front wall. For extra strength, pipe icing into the inside corners.
• Let the walls set for at least 1 hour. In the meantime, decorate your cookies!

Add the roof

• When the walls are dry, pipe icing along the top edges of the house.
• Place the roof panels on top, resting them on something stable (like jars or glasses) while they set.
• Pipe a generous line of icing along the top seam where both roof halves meet. Let the roof set for at least 30 minutes.

Time to decorate

• Start with the front, back, and sides of your house. Get creative! Use icing, sprinkles, candy canes, vegan marshmallows, cookies, chocolate buttons, edible glitter - whatever you love.
• Move on to the surrounding cake board (if decorating it), and save the roof for last to avoid bumping it while working.