Objective: How to prevent failure of writing something in the wrong size on a cake?

Which of the following solutions is more sound in terms of naive physics reasoning?

Available options: I. First use a toothpick and write your message, get it the right size, then go over with the icing. II. First use a icing nozzle and write your message, get it the right size, then go over with the toothpick.
I.