Step 1: Preheat the oven to 350°F (175°C).
Step 2: Line your muffin tin with paper liners or lightly grease it with baking spray.
Step 3: In a large mixing bowl, combine the old fashioned oats, baking soda, baking powder, ground cinnamon, and salt. Whisk together until well mixed.
Step 4: In another bowl, mash the ripe bananas and add honey, almond milk, melted coconut oil, eggs, and vanilla extract. Whisk until smooth.
Step 5: Pour the wet mixture into the dry ingredients and gently fold together with a spatula until just combined.
Step 6: If using, fold in chocolate chips or nuts into the batter.
Step 7: Spoon the batter into the muffin tin, filling each cup about 3/4 full. Optionally sprinkle turbinado sugar on top.
Step 8: Bake for 18-20 minutes or until a toothpick inserted comes out clean.
Step 9: Remove from oven and cool for a few minutes before transferring to a cooling rack.