01 - Dissolve yeast in warm water in a large mixing bowl. Let stand for 5 minutes until foamy.
02 - Whisk in sugar, melted butter, milk, egg, vanilla, and salt until thoroughly combined.
03 - Gradually incorporate flour, mixing until a soft, slightly sticky dough develops.
04 - Turn dough onto floured surface and knead for 3–4 minutes until smooth and elastic.
05 - Place dough in greased bowl, cover with clean towel, and let rise in warm area until doubled, approximately 1–1½ hours.
06 - Punch down dough and transfer to floured surface. Roll to ½-inch thickness and cut into 2-inch squares.
07 - Heat oil in deep fryer or heavy pot to 350°F.
08 - Fry beignets in batches for 2–3 minutes per side until puffed and golden brown. Avoid overcrowding the pan.
09 - Transfer beignets using slotted spoon to paper towel-lined tray to drain.
10 - Generously dust warm beignets with powdered sugar on all sides.
11 - Serve immediately for optimal texture and flavor.