Prepare the Dough

1. In a microwave-safe bowl, heat the milk for about 60 seconds until it reaches 110°F-120°F. Once heated, stir in the sugar until it’s dissolved. Melt the butter and cool.
2. In a stand mixer, combine all the dry ingredients, including the yeast. Then add the melted butter, egg, and stream in the milk. Mix on low speed for 2 minutes until well combined.
3. Increase the mixing speed to medium and continue beating for another 5 minutes. The dough should be in one large ball but may stick slightly to the sides of the bowl.
4. Turn the dough out onto a well-floured surface. Gently knead until the dough is soft and pliable in one consistent ball. Use your hands and a rolling pin to press and roll the dough into a rectangle shape, about 14”×18” inches. It should be at least ¼-inch thick.

Make the Filling

1. In a medium bowl combine the sugar and orange zest, rubbing the zest into the sugar with your fingers to macerate the zest and release the oils. Let sit for 5 minutes. Add in the salt, cinnamon, and nutmeg, and mix to combine.
2. Spread the softened butter onto the dough leaving at least ½ -inch of the dough bare on one of the long edges, so you can seal it after it’s rolled. Distribute the sugar mixture evenly over the butter and press into the butter.
3. Tightly roll the dough along the longer edge to form a log, and use the buttered edge to pinch it closed. Use a sharp knife or floss to cut the rolls into 12 even rolls.
4. Place the rolls in a well-greased (or parchment paper-lined) 9”×13” pan. Cover with plastic wrap and let rise in a warm spot, until doubled in size, about 60-90 minutes.
5. Preheat the oven to 375°F. Bake the rolls for 20-24 minutes until the tops are lightly browned. Remove from the oven and cool for 10 minutes, before adding the frosting.

Make the Frosting

1. Beat the softened cream cheese until it’s free of lumps. Then add the melted butter, 1 tablespoon of orange juice, orange zest, and vanilla extract and mix until combined. Next, add the powdered sugar and beat until smooth and combined. If you prefer a thicker frosting, add additional powdered sugar 2 tablespoons at a time.
2. To make it thinner, add additional orange juice 1-2 teaspoons at a time. Frost the rolls while they’re still warm and serve.