This is a wonderful truffle recipe: It's very quick to put together and still tastes like a ton of work went into it. It can be easily varied by subbing any other alcohol or flavoured-syrup for the rum.
Take 125g of the chocolate and grate it finely (Use a piece of paper to hold the chocolate so that it doesnt melt under your fingers). Chop the remaining 25g into small pieces.
Cream the butter (I used a spoon, but you may also use a hand-mixer). In portions add the grated and chopped chocolate as well as the chocolate/cocoa powder and the rum.
Form balls (about the size of a hazelnut) out of the mass (wash your hands with cold water if they get too warm to form the balls without melting all the chocolate) and roll them in your desired garnish (see above).
Place in candy wrappers and store in a box in a cool place (these will keep for up to 8 days).