Take bananas in a bowl. Better if you take ripe to over ripe bananas.
Mash with the potato masher. However you can use fork too.
Add sugar, milk and vanilla essence. Mix leaving behind no lumps.
It should have a consistency of dosa batter. To gain the said consistency, add little more milk spoon by spoon, if needed.
Now spread little oil on non stick tawa/griddle placed on low flame.
Take a ladle full batter and pour the batter in the center of tawa.
Gently spread the batter with the back of ladle by moving it in round direction. The method is similar to making of dosa except don't spread the batter too much thick. The thickness of pancakes should neither be too thick nor too thin.
After couple of seconds, pour few drops of oil on & along the sides of pancake.
After a minute or two, turn the side of pancake.
This way, keep cooking the pancake till it turns golden from both the sides.
Likewise make pancakes with rest of the batter.
Serve hot or cold with honey or maple syrup.