Preheat oven to 350 degrees F
Grease and flour loaf pans or line a 12 cup muffin pan with paper liners or grease with butter or a vegetable spray.
In a medium sized bowl whisk together the brown sugar, eggs, and mashed banana.
Add the melted butter to the brown sugar mixture and stir to combine.
In another large bowl combine the flour, baking powder, baking soda, cinnamon, and salt.
Gently fold in the berries, making sure they are coated with flour. This helps to prevent the berries from sinking during baking
Add the wet ingredients to the dry ingredients and stir only until the ingredients are just
combined. Do not over mix the batter or you will end up with tough bread
Place batter in loaf pan, 3 mini loaf pans ,or 12 muffin cups
Put in the oven and bake until a tester inserted in the center of a loaf comes clean about 30 - 35
If you made muffins 20 to 25 minutes. Transfer to a wire rack to cool.
Make 1 large loaf, or 3 mini loaves, or 12 regular sized muffins