I haven’t “written” on a cake in years. Like these other ladies, I use cutters or moulds for my letters. I also have a cheapie set from my Dollar store where you can push into a round circle and either go over with piping or lustre dust. I think the cutter/moulded letters look much more professional on a cake unless you have superior piping.
Creativity is God's gift to us. Using our creativity is our gift back to God. Clarky's Cakes 😎