In a large bowl, combine bananas, oil, eggs, brown sugar, orange zest and juice, and vanilla with a whisk until smooth.
On top of the wet ingredients, add flax seed, flour, baking soda, cinnamon, ginger, and salt. Stir just 5-6 times with a rubber spatula or wooden spoon. It wont be totally mixed, but its going to be ok.
Add remaining ingredients and stir a few more times, just until combined.
Transfer scoopfuls to the muffin pan.
Bake in the 425F oven for 5 minutes, then reduce the heat to 350F and continue to bake for 18-20 minutes.
Remove from pan and allow to cool for 5-10 minutes on a cooling rack.
Nutrition facts are sometimes provided below and are calculated using an online calculator. With specific brands of ingredients and additions, omissions, or substitutions the nutrition facts may change. We encourage you to use your own nutrition facts caculator to obtain the most accurate nutrition facts for your meal.