oil, frying three at a time. Cook, turning once, until puffy and cooked through. The original recipe says to cook 3 to 4 minutes total, but that was WAY too long. I cooked each donut 1 minute per side and that was perfect – cooked through completely but also not burned or dried out. With a slotted spoon, transfer doughnuts to paper towels to drain. Test temperature of oil, reheat to 375 if needed. Repeat process to fry remaining doughnuts.