I read that you can thin out the buttercream, to pipe on a cake. I need a small amount to write Happy B-day and I don't want to make a batch of royal icing.
I don't know what is the right consistency for piping and how to thin it out. Can anyone give me suggestions?
for just enough to write Happy Birthday, put a couple of spoonfuls of icing in a cup. Then I add about 1/4 spoon of water or milk (just for writing letters, I'd use water), and stir it in. This makes a nice easy-flowing icing, great for letters and fine piping.
I just did a dummy cake with TONS of Tip #1 piping on it (took me 2 days!) and thinned the icing this way.