striped frosting

how would i get the striped / gingham look with buttercream? i messaged the OG creator but have not heard back so wanted to know if anyone had any tips! *not my work – found from OH So Sweet on pinterest! by throwawayyyyy103882
#dining #cooking #diet #food #CookieDecorating #cookie
https://www.diningandcooking.com/2566377/striped-frosting/