01 - Dissolve the yeast in warm water in a small bowl. Let stand until foamy, about 5 minutes.
02 - In a large bowl, combine the milk, sugar, egg, and melted butter. Stir in the activated yeast mixture until well incorporated.
03 - Add the flour and salt, mixing until a soft dough forms. Transfer to a floured surface and knead for 3–4 minutes until smooth and elastic.
04 - Place the dough in a lightly greased bowl, cover, and let rise in a warm place for 1 hour, or until doubled in size.
05 - Punch down the dough and turn out onto a floured surface. Roll to 1/4-inch thickness. Cut into 2-inch squares or rectangles.
06 - In a deep fryer or heavy pot, heat vegetable oil to 350°F.
07 - Fry dough pieces in batches, turning once, until puffed and golden brown, about 1–2 minutes per side.
08 - Remove with a slotted spoon and drain on paper towels. While still warm, generously dust with powdered sugar.
09 - Serve immediately for best flavor and texture.