Sufganiyot

4 cups self-rising flour 2 (8 ounce) containers yogurt 2 large eggs 2 tablespoons white sugar 2 tablespoons vanilla sugar 1 pinch salt 3 quarts vegetable oil for frying Combine flour, yogurt, eggs, sugar, vanilla sugar, and salt in a large bowl; mix well. Set the dough aside for 30 minutes. Form dough into 2-inch balls. Heat vegetable oil to 365 degrees F (190 degrees C) in a large…