Preheat the oven to 325°F. Lightly grease a 9" x 9" pan, or 8" x 8" pan (for slightly thicker brownies)., Combine all the ingredients in a bowl and mix well., Spread the batter in the pan., Bake for 30 to 35 minutes, until a toothpick inserted into the center comes out with some moist crumbs clinging to it, but doesn't show any trace of raw batter., Remove the pan from the oven and cool the brownies before cutting and serving., Store, covered, for 5 days at room temperature, or freeze for up to a month.