Mix sugar, flour and knocking one egg, using a mixer the dough will zamechaem.

Meanwhile, in a water bath melt 100g of chocolate (1 standard tile), 100g butter and add a little bit of vanilla. As I have said many times baking this cake, using different chocolates and bitter, and milk. From bitter turns of a specific bitter taste, who likes it, you can safely do, and those who don't prefer milk chocolate.

Melt the chocolate, mix these two masses. Pour in the form, if necessary oil-lubricated (I have silicone, it doesn't need it). Sent in a preheated 200 degree oven and bake for 20-30 minutes, until dry matches.

When the cake is ready, place it on a plate and let slightly cool. Meanwhile, make the glaze. That is, also in a water bath melt the chocolate and butter. Sometimes instead of butter I pour a little milk. Pour glaze the cake, put into the fridge, so she froze. Decorate as desired.