Preheat oven to 350°F.
In one bowl, mix wet ingredients. In another bowl, mix dry ingredients. Add ingredients for mix-in to dry ingredients (optional).
Combine wet + dry and mix until smooth (and do not over beat the batter).
Spray a loaf tin with cooking spray.
Pour batter into loaf tin. Add ingredients for topping (optional).
Bake for 40-45 minutes (take out slightly underbaked - should pass toothpick test).
Let brownies cool slightly, then enjoy.
