1️⃣ Make the Dough
In a bowl, combine warm milk, yeast, and sugar. Let sit 5–10 minutes until foamy.Mix in egg, melted butter, salt, and flour. Knead until smooth (5–7 minutes).2️⃣ First Rise
Place dough in a greased bowl, cover, and let rise 1–1½ hours until doubled.3️⃣ Roll & Fill
Roll dough into a 14×9-inch rectangle.Spread butter evenly. Mix brown sugar and cinnamon, then sprinkle over butter.4️⃣ Shape Rolls
Roll tightly from the long side. Cut into 12 rolls.Place in a greased baking dish.5️⃣ Overnight Rise
Cover tightly and refrigerate 8–12 hours.6️⃣ Bake
Remove from fridge and rest 30 minutes.Bake at 350°F (175°C) for 25–30 minutes, until golden.7️⃣ Make Frosting
Beat cream cheese and butter until smooth.Add powdered sugar, vanilla, and milk until creamy.8️⃣ Frost & Serve
Spread frosting over warm rolls and serve immediately.