Dough: – ½ cup warm whole milk (110 degrees F (43 degrees C)) – 3 tablespoons molasse – 1 (.25 ounce) envelope active dry yeast – ¼ cup granulated sugar – 2 teaspoons kosher salt – 4 ¾ cups all-purpose flour, divided, or more as needed – ½ cup sour cream – 6 tablespoons unsalted butter, softened – 1 large egg, lightly beaten – cooking spray Filling: – ½ cup unsalted butter, at room temperature – 1 cup firmly packed light brown sugar – 1 tablespoon molasse – 2 teaspoons ground cinnamon – 2 teaspoons ground ginger – ½ teaspoon ground clove Glaze: – 4 ounces cream cheese, at room temperature – 4 tablespoons unsalted butter, at room temperature – 1 ½ cups powdered sugar – ½ teaspoon vanilla extract – 1 tablespoon whole milk, or more as needed