Mix baking soda, baking powder, salt and sugar. Add water and stir well. Add this mixture to the all purpose flour, then gently stir for a few seconds.

Add vegetable oil & mix until well combined. Cover and leave it for 4 hours at room temperature.

Heat oil in a wok or frying pan. Dust work surface with flour. Roll the dough into a sausage shape. Cut into 1" pieces, form a ball then roll out into a thin circle (4-5mm) or to make the other style: cut into 2" pieces. Dab a little water in the centre of each piece & stick another piece to it - to form an X shape.

Caefully drop doughnuts 2 at a time into hot oil and fry it until they rise to the surface & are golden.