"If the royal icing doesn't set up, it will drip on the tree," Michelle says, deciding to decorate her cookies for the Halloween cookie tree Pre Heat with modeling chocolate, whereas Tamara and Veronica are sticking with royal icing. But Veronica runs out of icing and waters down what she has left to stretch it. Michelle runs into issues when she leaves her modeling chocolate in the blast chiller too long, and ends up using the microwave to soften it before rolling it out.