Combine dissolved yeast, warm milk, sugar, 1 tablespoon softened salted butter, 3 cups of flour, and salt in a stand mixer. Gradually add in the remaining cup of flour. When the dough starts to form a ball, remove it to a lightly floured surface. Knead the dough until it is smooth and elastic.
Turn the dough out onto a lightly floured surface and roll the dough into a 16×8-inch rectangle. Brush a thin layer of egg wash over the dough and sprinkle on the cinnamon-sugar mixture.
Start rolling up from one of the short sides (one of the 8-inch sides). Roll fairly tightly. Place the loaf into the prepared loaf pan. Slash the top of the loaf three times, about ¼ inch deep. Brush the loaf with 1 tablespoon melted butter. Bake for 40 minutes on the lowest rack of the oven. If needed, bake for another 5 minutes if not done.