Using a dough hook, mix Prima Doughnut Mix and water on low speed for 1 minute. Increase to medium speed for another 9 minutes. Cover the dough and let it rest for 30 minutes at room temperature.
Roll the dough into a rectangle sheet on a floured surface. Fold ⅓ of the rectangle towards the center then fold the other end towards the center rest for 10 minutes. Turn 90 degrees and repeat the step.
Roll the dough out to 10mm thick and cut with a floured doughnut cutter. Cover and let it rest for 1 hour at room temperature.
Heat oil to 180°C and deep fry doughnuts until golden brown.
Dust doughnut with icing sugar and serve.
Tips: For the remaining dough roll them into doughnut balls.