Get all the ingredients and materials together.
Add flour into a sifter.
Add baking soda.
Sift all the ingredients until there is none left in the sifter.
In a separate bowl, add sugar.
Whisk the eggs and sugar together for 10 minutes.
Slowly add in oil.
Mash 2 or 3 bananas.
Add the bananas to the wet ingredients.
Add vanilla extract.
Add sour cream.
Fold in the dry ingredients.
Spray the sides of the loaf pan.
Put a piece of parchment paper on the bottom of the loaf pan.
Pour the batter into the loaf pan.
Bake for 45 minutes to an hour on 350 degrees.
Let cool before eating.