Combine all dry ingredients: flour, sugar, baking powder, baking soda and salt.
In separate bowl, mash the bananas and pile them up on side of bowl.
Then beat the egg in the same bowl (on other side)
Mix in oil, yogurt and vanilla to the eggs, then combine with bananas.
Fold the dry and wet ingredients together.
Spray muffin tins
and preheat oven to 350.
Bake for 20 mins or until toothpick comes out clean.
Filling tins 1/2 full should make 16-18 muffins.