Thinly slice the green papaya, then cut into matchstick strips. Soak the strips in ice-cold water for a while, then drain and set aside.

In a mixing bowl, combine the crispy frying flour and sugar. Mix well. Add the ice-cold water and stir until the batter is smooth with no lumps.

Add the papaya strips to the batter and toss until they are evenly coated.

Heat vegetable oil in a pan. Once the oil is hot, add the battered papaya strips and fry until golden and crispy. Remove and drain on paper towels.