Crumble the brownie into the bottom of 2 serving glasses. Drain the cherries, reserving the juice. Add a tablespoon of the cherry juice to each glass over the brownie. Tumble in a few cherries on top of each and add a layer of the chocolate mixture. Squirt a little cream or dollop a spoonful of creme fraiche on top of the dessert and finish with a final cherry on top.