Today was my first lab in my pastry class. We melted a little chocolate, then made piping bags from parchment paper. We practiced piping filigree, borders, and letters. I seem to be able to make the bags fairly reliably. Really need to work on hand steadiness for the borders and letters. It's calligraphy in chocolate, and I have really lousy handwriting.
We also practiced piping frosting, using this nasty artificial stuff with a sticky consistency somewhere between twinkie filling and drywall spackle. This stuff doesn't spoil, ever, and is temperature stable. It can be recycled and re-piped endlessly. Worked on rosettes and shells. I did better with the shells than the rosettes. I need to practice, a lot.