After an hour, I checked for doneness. The spot I checked appeared to be done. But, when I got it out of the oven and eyeballed it, not yet. Back for another 15 minutes. Checked again with same results -- pulled it out of the oven and this time, could not save it. Oven thermometer read 350 and the brownies I baked the next day were fine. When I put it down the garbage disposer, cake was 50% raw. What a waste of ingredients!