Prepare a medium-sized bowl, peel the bananas, and discard the skins.
Slice the bananas lengthwise into 4 sections, but ensure the ends remain connected (forming a fan shape). Place them in the container and repeat these steps until all bananas are done.
Prepare another bowl, dissolve all the ingredients for the batter in cold water. Stir until well mixed. Cover the batter container with plastic wrap and let it rest in the refrigerator.
Heat oil in a pan over medium heat.
Once the batter has cooled, stir it again.
Dip the bananas into the batter, spreading them to maintain the fan shape until the entire surface is covered. Fry the bananas in hot oil until both sides are golden brown.