Activate the yeast: In a small bowl, mix the warm water, warm milk, sugar, and yeast. Let it sit for 5–10 minutes until foamy.

Make the dough: In a large bowl, whisk together the flour and salt. Add in the yeast mixture, eggs, and softened butter. Mix until a dough forms.

Knead: Knead the dough by hand or with a stand mixer for 8–10 minutes, until smooth and elastic.

Let it rise: Place the dough in a greased bowl, cover it with a towel or plastic wrap, and let it rise in a warm place for 1–1½ hours, or until doubled in size.

Shape the rolls: Roll out the dough on a lightly floured surface into a rectangle about ¼ inch thick. Brush with melted butter, then roll it up like a jelly roll. Slice into 1-inch pieces.

Second rise: Place rolls on a parchment-lined baking sheet. Cover and let them rise again for 45 minutes to 1 hour.

Bake: Preheat oven to 350°F (175°C). Brush the tops with egg wash (1 egg beaten with a splash of water) and bake for 15–18 minutes, or until lightly golden.

Finish: Let cool slightly and dust generously with powdered sugar before serving.