Quarkbällchen are delicious German Donuts made with Quark. You can also make them, if you do not have quark available, with a cream cheese and yoghurt mixture. These are made in no time - and eaten even faster.
In a saucepan, add the oil, ensuring it is about 10 cm (4 inches) deep. Heat the oil to 170°C (340°F). You can check the temperature with a kitchen thermometer or by dipping the handle of a wooden spoon into the oil—if bubbles form around the spoon, the oil is ready.
3 cups neutral oil
The easiest way to form the doughnuts is to dip a metal ice cream scoop into the hot oil and use it to carefully slide the dough into the oil. Alternatively, you can use two tablespoons to drop the doughnuts into the oil or shape the dough into balls with wet hands.
AvAvoid overcrowding the pan, as the doughnuts will expand. Turn them regularly to ensure even browning. The exact frying time will depend on the size of your doughnuts, but mine took about 5 minutes. To check for doneness, remove one doughnut and cut it open to ensure it's cooked through. If the doughnuts brown too quickly, lower the heat immediately.
Remove the doughnuts from the pan with a slotted spoon and drain them on a paper towel to remove excess oil. Then, roll them in cinnamon sugar or dust them with powdered sugar.
Notes
to make the cinnamon sugar: combine ½ cup of granulated sugar with 2 teaspoon of ground cinnamon.