Decorate cookies. Prepare Color Flow icing following recipe directions; tint portions kelly green/black combination (for dark green), leaf green/lemon yellow combination (for light green) and red- red/black combination (for red). Reserve a small amount of white.
Use tip 3 to outline leaf cookies, two in light green and one in dark green for each treat. Use tip 2 to outline berry cookies in red. Let set 10 minutes. Use thinned Color Flow icing in cut parchment bags to flow in cookies. Immediately use tip 1 and thinned white icing to pipe dots on leaves, 1/2 in. from tip of leaf. Let dry 24 hours.