In a large mixing bowl, combine the warm water and active yeast. Let it sit for about 5 minutes until it becomes frothy.
Whisk in the sugar, whole milk, large egg, egg yolk, and melted butter until well combined and smooth.
In a separate bowl, whisk together the all-purpose flour and sea salt. Gradually add to the wet ingredients, stirring until a soft dough forms.
Transfer the dough to a floured surface and knead for about 5-7 minutes until smooth and elastic.
Place the kneaded dough in a greased bowl, cover, and let it rise in a warm place for about 1 to 2 hours, or until it doubles in size.
Once risen, punch the dough down and roll it out to about 1/4-inch thickness. Cut into squares.
Heat about 2-3 inches of neutral oil to 350°F (175°C) in a deep frying pot or heavy skillet.
Fry the squares for about 2-3 minutes on each side, or until golden brown. Remove and drain on a wire rack.
While warm, dust with powdered sugar and enjoy!