Mash the bananas with mixer or with potato masher in mixing bowl.
Add vegetable oil, egg, vanilla and brown sugar and mix with a blender or hand whisker.
Combine flour, salt, cinnamon, baking soda and 1 cup chopped nut.
Combine the dry ingredients with wet ingredients and stir until combine.
Cover the bowl with a towel and allow the batter to rest for 15 minutes. Meanwhile preheat the oven to 425ºF.
Line a muffin pan with muffin liners. Fill the liners to the top with batter. Press the remaining ½ cup of nuts onto the tops of the muffins. Add sanding sugar if you like.
Bake for 9 minutes at 425ºF, then keeping the muffins in the oven turn the temperature down to 375ºF and bake for 13-15 minutes or until a toothpick inserted in the center comes out clean. Allow the muffins to cool in the pan for 10 minutes before moving them to a cooling rack