Banana Oat Bran Muffins

1 and 1/8 cups oat bran 1 tablespoon ground cinammon 1 tablespoon baking powder 1/8 cup brown sugar 2 frozen bananas, thawed and mashed 1 large egg or 2-3 egg whites 2 tablespoons vanilla extract 1 tablespoon agave or honey or maple syrup, or more to taste 1/4 cup raisins or craisins or whatever is on hand (optional nuts, roasted fruit chunks, etc) Preheat oven to 425 degrees. Spray 6 cup muffin tin with nonstick cooking spray. Mix dry ingredients in a large bowl. Mix dry ingredients in a separate bowl. Stir together to combine all ingredients. Divide batter among muffins cups. Bake until a metal tester comes out clean -- 12-15 minutes. Cool on a wire rack, and store in an airtight container at room temperature.