Preheat the oven to 350 degrees.

Grease a round cake pan (about 10 in.).

In a pan melt the butter and chocolate until fully melted and set aside to let it cool off slightly.

In the meantime, mix the flour, sugar and eggs until well combined. Now add the chocolate mix and stir again till smooth. Pour the mixture into your baking pan and bake for 20-25 minutes. When the cake is done it should still be moist at the center.

Decorate as desired.