For many happy occasions you’ll want to write a special sentiment on a cake. The problem is not what to say, but how to make it both legible and gorgeous. Everyone has had a good chuckle over the cakes on Cake Wrecks, but we want to avoid having our efforts resemble those mishaps. With a few tricks of the trade and a bit of practice anyone can write on a cake like a pro. In my previous how-to videos we have built the foundation for this cake and are now ready to put on the finishing touches
Equipment and ingredients needed to write on your cake:
Parchment Paper Sheets – 12 × 16½  – used to practice tracing letters with icing.
Large Parchment Triangles  (or plastic disposable pastry bag fitted with a very small round tip)
½ cup chocolate, melted
Mayonnaise or smooth mustard for practicing
If you are unsure of your handwriting or want to do something a bit fancy, I recommend finding an example of a font you like and print it out. Cover the sheet of paper with parchment or wax paper, so you can clearly see the lettering beneath it. You can use mayonnaise or smooth mustard to practice your writing, so as not to waste your chocolate. Use a parchment paper pastry bag or a pastry bag fitted with a very small round piping tip.
How to fold a perfect paper parchment bag:
When I was in culinary school I remember having to create about 100 of these paper pastry bags and they all had to hold water. That may be a bit extreme, but practice makes perfect, so plan to make a few before you really get the hang of it.
Fill the bag about ½ way with the melted chocolate (mayonnaise or mustard for practicing) and snip a very small hole at the end of the bag, if using parchment. The trick is to get a nice clean cut and start very small; you can always make the hole larger if it is too small.
Trace the letters, trying to get nice smooth lines. This exercise will give you practice writing with a steady hand before attempting it on the cake. Do this several times, until you feel comfortable writing in this style.
Now you are ready to write on the cake, but before you start with the chocolate, draw the letters on the cake with a skewer. If you don’t get the spacing right on the first attempt it is easy to wipe the surface clean with a cake-decorating spatula. Now you can try it again. This step is particularly helpful when writing long messages like “Happy Graduation Christopher!” It can be tricky to fit it all on a small round cake and you may have to curve the words. No problem, when you are sketching it out first you can try and try again.
Once you have the letters in the right place, trace them with the chocolate.