Cut the banana into 4-6 pieces.
In a large bowl, combine together plain flour, rice flour, cardamom, sugar, and ground turmeric. Add enough water to make smooth batter.
Meanwhile, add enough oil to cover the bottom of a large skillet over medium heat. Dip the banana pieces in batter, and place them in hot oil. Do not overcrowd the pan. Fry until golden. Transfer the fried banana fritters to a plate lined with absorbent paper.
Serve them hot with coffee or tea.
