There is nothing mysterious about making bread! Practice makes perfect so bake, bake, bake!
Pre-heat your oven @375 degrees F. (180 degrees C.). Prepare a muffin tin with paper liners (or grease very well with oil or cooking spray if you prefer not to use paper liners).
Peel the bananas, take them in a big mixing bowl and mash them with a fork.
Now add oil, vanilla extract, and sugar. Mix it very well until sugar dissolves.