In a large bowl with a wooden spoon or in a stand mixer (using the dough hook), combine the flour, yeast, baking powder, and salt. Add the milk mixture and eggs and beat thoroughly until the dough begins to form. Gradually stir in the softened butter and knead the dough for about 5 minutes in the stand mixer or on a floured work surface. Place the dough in a clean and lightly oiled bowl. Let stand in a warm and humid place for about 2 hours or until the dough has doubled in size.
