Preheat the oven to 375 degrees and oil the muffin pan or line it with cupcake liners.
Mix the flour, salt, baking soda, baking powder and nuts, if using.
To the bowl add the oil, sugar, applesauce, molasses if using, flax eggs, bananas and vanilla extract.
Mix with a spatula until all the wet ingredients are just moist. Do not overmix. The batter should be lumpy, like pancake batter, rather than smooth.
Divide the batter equally among the 12 muffin tins.
Bake for about 18 minutes or until a toothpick inserted in the middle of a muffin comes out almost dry, with a few crumbs sticking to it.
Let cool for a couple of minutes before unmolding. They taste great warm or at room temperature.