Scald The Milk And Bloom The Yeast: First start by scalding the milk, add the milk into a microwave-safe bowl, and heat in intervals of 30 seconds. You can also use a pot, the milk is scalded when the temperature reaches 180F°F or 82°F.
Remove the scalded milk and allow it to cool down to 108°F or 42°C, for about 10 minutes.
Take 2 tablespoons from the milk and add to the yeast in a small bowl and stir together. Allow the yeast to bloom for 10 minutes, it will begin to bubble and foam at the surface.
Prepare The Dough: Add the flour, salt, sugar, egg, yeast, and milk into a mixing bowl of a stand mixer. Attach the hook and mix on slow speed for 5 minutes, then increase the speed and continue to mix for 6-7 minutes or until the dough is developed a smooth silky texture. The desired dough temperature should be between 78-82°F (26-28°C).
Add the butter and mix for 3 minutes on low speed or until the butter is blended into the dough.
Transfer the dough to a greased or floured bowl. Cover and let it rest for 20 minutes.
Prepare The Cinnamon Filling: Combine the birth sugars with the cinnamon in a bowl and whisk together. Set aside.
If the butter is hard, place it in a bowl and microwave it for a few seconds to soften.
Add The Filling And Shape The Giant Cinnamon Roll: Turn the dough onto a floured work surface. Flour the rolling pin, and roll out the dough into a rectangular shape about 12X16 inches.
Spread the softened butter evenly over the top of the dough leaving about 1/2 inch unbuttered from the top end of the dough. This will help to seal the seams once the dough is rolled into a log.
Sprinkle evenly the cinnamon mixture over the butter and lightly pat it down.
Shape Into Giant Cinnamon Bun: Grease an 8-inch round cake pan or cast iron skillet.
Cut strips of dough about 16X2 inches, you should get 6 strips.
Curl and roll one strip, then match the roll with the end of the second strip, and roll into a coil. Repeat with two more strips then transfer the roll to the center of the cake pan or skillet. Wrap the remaining two strips one at a time around the cinnamon roll.
Cover the pan or skillet with a damp kitchen cloth or plastic wrap and allow it to rise for 35-40 minutes or until the roll reaches the sides of the pan.
Preheat the oven to 365°F (185°C), and set the rack to the middle position.
Bake the huge cinnamon bun for 25-30 minutes or until golden brown on the top. If you have a thermometer the internal temperature should be above 200°F (93°C), this indicated the cinnamon roll is baked through.
Remove the big cinnamon bun from the oven, then transfer it to a cooling rack.
Prepare The Cream Cheese Frosting: Add the cream cheese, icing sugar, vanilla, and butter into a bowl and beat with a hand mixer or stand mixer with the paddle attachment until the frosting is smooth and creamy. You can whisk the ingredients together until the frosting consistency is achieved.
Spread the cream cheese icing evenly over the top of the cinnamon roll.
Serve warmly sliced into wedges.
Enjoy your huge cinnamon roll!