Preheat your oven to 350°F and line a muffin tin with paper liners or lightly grease with cooking spray.
Mix all of the ingredients together in a large bowl. Stir until well mixed.
Add optional mix-ins, such as chopped nuts or dark chocolate chips, for extra flavor and texture.
Scoop the batter into the prepared muffin tin, filling each cup about two-thirds full.
Bake for 15 minutes, or until a toothpick inserted into the center of a muffin comes out clean. Don't over bake!
Remove the muffins from the baking tin and let them cool on a cooling rack.