In a big bowl, mash the bananas with the back of a fork until small chunks form. Add the flour, egg and sugar. Mix all the ingredients well to form a batter.
Heat up a frying pan and add some cooking oil for deep frying. Once the oil is heated, drop a spoonful of batter into the frying pan. Try to "shape" the batter, so it's somewhat round. Deep fry the fritters until golden brown.
Remove the fritters using a strainer. Drain on paper towels. Serve warm.
