Prepare roll out cookie dough. Cut with Gingerbread House Cutter. Bake and cool.
Prepare color flow icing. Use tip 3 and full-strength brown color flow icing to outline house; let set. Use tip 3 and thinned-down brown color flow icing to fill in house; let set. Use tip 3 and full-strength white color flow icing to outline door and trim with jumbo rainbow nonpareils. Use tip 3 and full-strength white color flow icing to outline and fill in window on door, outline windows and add jumbo rainbow nonpareils for house doorknob and above windows. Use tip 14 and full-strength green icing to pipe stars for wreath; add red nonpareils for berries on wreath. Use tip 16 and full-strength green color flow icing to pipe zigzag bushes at base of house. Use tip 3 and full strength white color flow icing to pipe icicles on chimney, house peak, windowsills and bushes.
One of the most popular techniques, stars come in a range of sizes and styles. Experiment with open and closed stars for variation in look. The star technique is timeless and can be used as a classic border or as a stunning fill-in for the top of a dessert.