Take all-purpose flour. baking soda sugar and salt in a bowl mix well. pour water little by little and make it a thick batter rest for 15 mins. Cut banana in 05 inch (thik ness) pieces. Dip banana peices into the batter which we already prepared heat oil in a pan transfer banana pieces to it. Fry it in medium flame. Turn another side also fry till it became golden yellow colours.remove from the oil when it done