I have my chocolate molds right out of the refrigerator. They're nice and firm and ready to be filled. I'm going to go on ahead and with a piping bag. You can choose any filling you like, whether it's store-bought or caramel. I'm using Nutella. You can make your own ganache and fill it up. I'm going to take my piping bag and fill up my molds until they are three-quarters of the way full.