Preheat the oven to 350ºF and line a muffin tin with silicone muffin cups or generously spray muffin tin with non-stick cooking spray.
In a large bowl, mash banana, Add in eggs, maple syrup, milk and vanilla. Mix to combine. Set aside.
In another large bowl, mix together all of the dry ingredients.
Slowly add the wet ingredients to the dry ingredients. Mix until combined.
With a spoon, add batter to each muffin cup, filling each to close to the top. Add desired toppings to the top of each cup, pressing into the cup slightly to get some of the ingredients into the centre of the muffins.
Bake for 20-23 minutes or until inserted toothpick comes out clean. Allow to cool before removing from muffin tin.