Have trouble writing on cakes? See some tips below! - Consistency is key! Use thin consistency icing, but if it is dry add some corn syrup which will add elasticity, so the lines are less likely to break. - Use a toothpick to trace the letters or free hand! - Start by holding the bag at a 45 degree angle with the tip lightly touching the surface, with steady presure squeeze out a straight line, lifting the tip above the surface to let the icing stream down | Wilton Cake Decorating