Place potatoes in a large bowl. Add yogurt, 1 teaspoon salt, and 1/2 teaspoon pepper into a large mixing bowl. Toss until well combined. Set aside, and let mixture sit for about 15 minutes.

Meanwhile, in a small bowl, add flour, paprika, onion powder, garlic powder, and the remaining salt and pepper. Whisk to mix. Set aside.

Heat enough oil in a frying pan to reach about halfway up the sides or just enough for pan frying over medium heat. Remove potatoes from the yogurt mixture, and lightly coat in the flour mixture. Shake off any excess flour.

Cooking in batches, place potatoes in the hot oil and fry potatoes for about 5 minutes per side or until golden brown and potatoes are tender. Drain on a rack over paper towels. Serve while warm with ranch dressing.