I use this recipe for when adults are coming over, it is a very rich brownie. Freeze any left over for a coffee in the sun at a later date!
Cooking time will vary, and you will have to use your cooking radar, I take them out when they look right and smell as if they are cooked. Nothing is better than your cook's instinct! Put pecans in if you like, I just make them without as it is easier to cut them into little morsels of yumminess.