Preheat the oven to 180 degrees and grease a square cake tin or individual muffin tins.
Melt the chocolate squares in a double boiler and then let the butter melt in the melted warm chocolate.
Clean the cherries washing them and sorting their pits.
In a bowl, mix the melted chocolate and butter cream with the sugar, a pinch of salt and the eggs... then mix the flour and finally the cherries.
Pour the brownie mixture into the greased tin(s) and bake for 25-30 min.