Now make a water bath. To do this, pour water in a saucepan , and on top put the bowl so that the water does not reach its bottom, it is very important. If you overheat the chocolate - it will curdle into flakes. When the water is boiled, put the broken chocolate, butter, water and coffee in the bowl. In case if you don’t like excessively chocolate tastes then don’t add coffee but a part of chocolate replace for a milk one.