For cookies I cover in chocolate I usually use add coconut oil to the liquefying chocolate to get a smooth mass. However, here it is really hard to get and even big supermarkets usually don't have it. ...
I melted chocolate to put on top of some caramel flapjacks. The chocolate wasn't very runny so I added a little bit of olive oil. However this made it grainy and lumpy as if I had added water. ...