The hesitant brownie

I am not sure whether I had overbaked this double chocolate brownie but the top seemed a bit crusted. I need to get some feedback from my friends who had eaten the brownie. It is always difficult to gauge whether the brownie is done or not. The recipe recommended the brownie to be baked for 30 minutes but when a skewer is inserted, it was still wet. Is that normal? hmmm more experimentation to come.