2 packages (1/4 ounce each) active dry yeast
1/2 cup warm water (110° to 115°)
1/2 cup warm 2% milk (110° to 115°)
1/3 cup butter, softened
1-1/3 cups sugar, divided
3 egg yolks
1 teaspoon salt
3 to 3-3/4 cups all-purpose flour
3 tablespoons jelly or jam
1 egg white, lightly beaten
Oil for deep-fat frying
In a small bowl, dissolve yeast in warm water. In a large bowl, combine milk, butter, 1/3 cup sugar, egg yolks, salt, yeast mixture and 3 cups flour; beat until smooth. Stir in enough remaining flour to form a soft dough (do not knead)
Place in a greased bowl, turning once to grease top. Cover and let rise in a warm place until doubled, about 45 minutes.
Punch dough down. Turn onto a lightly floured surface; knead about 10 times. Divide dough in half.
Roll each portion to 1/4-in. thickness; cut with a floured 2-1/2-in. round cutter. Place about 1/2 teaspoon jelly in the center of half of the circles; brush edges with egg white. Top with remaining circles; press edges to seal tightly.
Place on greased baking sheet. Cover and let rise until doubled, about 45 minutes.
In an electric skillet or deep-fat fryer, heat oil to 375°. Fry doughnuts, a few at a time, 1-2 minutes on each side or until golden brown. Drain on paper towels. Roll warm doughnuts in remaining sugar. Yield: 16 doughnuts.
Recipe found here: Jelly Doughnuts