2 tablespoons active dry yeast
4 tablespoons sugar, plus sugar for rolling
3/4 cup lukewarm milk
21/2 cups all-purpose flour
2 egg folks
Pinch of salt
2 teaspoon cinnamon
1 1/2 tablespoons softened butter at room temperature
Vegetable oil, for deep frying
Plum, strawberry or apricot jam
Mix the yeast and 2 tablespoons of sugar in milk then leave alone for 10 minutes. In the meantime, sift the flour, put it on a cutting board, and make a well in the center. Pour the yeast mixture into the well, add the egg yolks, salt, cinnamon, and the remaining sugar. Knead well. Then, work the butter into the mixture and knead until the dough is elastic. Cover and let rise overnight in the refrigerator.
Sprinkle a little flour on a board. Roll the dough out to 1/8 inch with a drinking glass, cut the dough into rounds about 2 inches in diameter. Cover and let rise for 15 minutes alone.
With your hands, form the founds of dough into balls. Insert 1 teaspoon of jam into each and cover completely.
Pour 2 inches of oil into an electric frying pan and heat to 375 degrees. Gently drop the doughnuts into the oil, 4 or 5 at a time, turning when brown. Drain on paper towels. When slightly cooled, roll in sugar and serve immediately. Makes about 24 doughnuts.