📖 Instructions

1. Warm the Milk: In a small saucepan or microwave-safe bowl, gently warm 1 cup (240ml) whole milk until it's lukewarm (about 105-115°F or 40-46°C). It should feel warm but not hot to the touch. If it's too hot, you'll kill the yeast, and no one wants flat cinnamon rolls! Pour the warm milk into the bowl of a stand mixer fitted with the dough hook attachment.
2. Activate the Yeast: Sprinkle 2 ¼ teaspoons (7g) active dry yeast over the warm milk. Add 1 tablespoon of granulated sugar. Stir gently with a spoon. Let this mixture sit for 5-10 minutes, or until it becomes foamy. This indicates your yeast is alive and ready to work its magic. If it doesn't foam, your yeast might be old or the milk wasn't the right temperature, so you'll need to start again.
3. Combine Wet Ingredients: To the foamy yeast mixture, add 1 large egg (at room temperature), 1/4 cup (50g) melted unsalted butter (cooled slightly so it doesn't cook the egg!), and 1 teaspoon of vanilla extract. Mix on low speed until just combined.
4. Add Dry Ingredients: Gradually add 3 ½ to 4 cups (420-480g) all-purpose flour and 1/4 cup (50g) granulated sugar, and 1 teaspoon of salt to the wet ingredients. Start with 3 ½ cups of flour. Mix on low speed until a shaggy dough forms, then increase to medium-low. Knead for 5-7 minutes. The dough should gather around the hook, be smooth and elastic, and barely sticky to the touch. If it's too sticky, add the remaining flour a tablespoon at a time.
5. First Rise (Bulk Fermentation): Lightly grease a large bowl with a little oil. Transfer the kneaded dough to the bowl, turning it once to coat. Cover the bowl tightly with plastic wrap or a damp kitchen towel. Let it rise in a warm place for 1-1.5 hours, or until it has doubled in size. A slightly warm oven (turned off!) or a sunny spot on your counter works well. This is an important step; don't rush it!
6. Prepare the Filling: While the dough is rising, make your filling. In a small bowl, combine 1/2 cup (100g) packed light brown sugar, 2 tablespoons ground cinnamon, and a pinch of ground nutmeg (optional, but so good!). Stir well to combine. Melt 1/4 cup (50g) unsalted butter and set aside.
7. Roll Out the Dough: Once the dough has doubled, gently punch it down to release the air. Lightly flour a clean surface. Turn the dough out onto the floured surface and gently roll it into a large rectangle, about 18x12 inches (45x30 cm) and about 1/4 inch (0.6 cm) thick. Try to keep the edges as straight as possible.
8. Assemble the Loaf: Brush the melted 1/4 cup (50g) unsalted butter evenly over the rolled-out dough, leaving a small 1/2-inch border along one of the long edges. Sprinkle the cinnamon sugar mixture generously and evenly over the buttered dough, making sure to go all the way to the edges, except for that small border you left plain.
9. Roll the Loaf: Starting from the long edge opposite the plain border, carefully and tightly roll the dough into a log. Once rolled, pinch the seam closed along that plain border you left, ensuring it’s sealed. Gently stretch and even out the log so it's uniform in thickness.
10. Prepare for Second Rise: Lightly grease a 9x5 inch (23x13 cm) loaf pan. Carefully transfer the cinnamon roll log into the prepared loaf pan, seam-side down. Cover the loaf pan loosely with plastic wrap or a damp towel.
11. Second Rise (Proofing): Let the loaf rise in a warm place for another 30-45 minutes, or until it looks puffy and has nearly doubled in size. While it's rising, preheat your oven to 375°F (190°C).
12. Bake the Loaf: Place the loaf pan in the preheated oven. Bake for 25-30 minutes, or until the top is golden brown and the internal temperature reaches 200-210°F (93-99°C). If the top starts browning too quickly, you can loosely tent it with aluminum foil. Remove from oven and let it cool in the pan on a wire rack for about 10-15 minutes.
13. Prepare the Thick Icing: While the loaf cools slightly, make the icing. In a medium bowl, whisk together 2 cups (240g) powdered sugar, 1/4 cup (57g) softened cream cheese, 2 tablespoons (28g) softened unsalted butter, and 1 teaspoon vanilla extract. Add 1-2 tablespoons of whole milk, one teaspoon at a time, until you reach a thick, pourable, yet luscious consistency. You want it thick enough to really cling to the loaf, not just run off.
14. Ice and Serve: Once the loaf has cooled slightly (it can still be warm, which helps the icing melt just a bit!), invert it onto a serving platter or leave it in the pan. Pour the thick icing generously over the top of the warm cinnamon roll loaf, letting it drip down the sides. Slice and serve warm. It’s best enjoyed fresh, but leftovers are still pretty darn good heated up a bit!