Over an waterbath melt butter and chocolate together until completeley melted. Add the sugar and eggs and cream together.
Preheat oven to 200°C and prepare small oven-safe dishes or cups by oiling them. Add the flour and cacao powder to the mix and pour into the prepared dishes.
For an extra chocolate flavour press a piece of chocolate in every cup until it's completelely covered with the dough.
Bake for 10 minutes until the egdes are slightly brown and hard but the center is still soft. Serve warm with powdered sugar or ice cream.