2 (16 by 16-inch) pieces white foam core board Hot glue gun, or 2 cups royal icing Pastry bag with a small round tip, or resealable bag Ruler Razor blade Battery operated candle votive
Draw a 7 by 7-inch square in the center of 1 piece of the foam core board as a guide for the foundation of the house. Start gluing the sugar cubes around the outline with either the hot glue or royal icing. Make sure to leave a space for the door and once you get to the third level of cubes, leave space for 2 windows on each side. Once the sides are 5 to 6 inches high, arrange the sugar cubes in a pyramid pattern on 2 ends of the house to form the pitched support walls for the roof.
Cut the second piece of foam core to form a 10 by 10-inch square and score it down the middle. Bend it in half to form a peaked roof and glue it to the top of the house. Decorate the roof with the marshmallows or round white candies.
Fill the pastry bag or resealable bag with some of the frosting and use it to fill in any gaps in the house or on or around the roof.
Use any remaining sugar cubes, round white candies, white chewy candies, or marshmallows to adorn the house or make decorations (trees, bushes, fences, or snowmen) around the house on the foam core board. Use extra icing to create snowdrifts around the house. Place the battery operated votive light inside the house to illuminate it.
If you choose to use the hot glue, the decorations will not be edible.