Creating One Hour Cinnamon Rolls is as easy as following these simple steps:

1. Activate Yeast: In a large mixing bowl, combine warm milk, yeast, and sugar. Allow it to sit for about 5 minutes, until bubbly.
2. Mix Wet Ingredients: Add melted butter and egg to the yeast mixture. Stir until fully combined.
3. Add Dry Ingredients: Gradually mix in 3 ½ cups of flour and salt. Stir until a dough starts to form. If sticky, add more flour, one tablespoon at a time.
4. Knead the Dough: On a floured surface, knead the dough for about 5 minutes until smooth and elastic.
5. First Rise: Place the dough in a greased bowl, cover with a damp cloth, and let it rise in a warm place for 20 minutes.
6. Prepare Filling: In a small bowl, mix brown sugar and cinnamon together thoroughly. Set aside.
7. Roll the Dough: After the first rise, roll out the dough on a floured surface into a rectangle about 12×16 inches.
8. Spread Butter: Evenly spread the softened butter over the surface of the dough.
9. Add Filling: Sprinkle the cinnamon-sugar mixture generously over the buttered dough.
10. Roll Up: Starting from the long edge, tightly roll the dough into a log.
11. Slice Rolls: Cut the rolled dough into approximately 12 equal pieces. Arrange them on a greased baking sheet.
12. Second Rise: Cover the rolls with a damp cloth and allow them to rise for an additional 10 minutes.
13. Preheat Oven: During the second rise, preheat your oven to 350°F (175°C).
14. Bake: Bake the rolls in the preheated oven for 15-20 minutes, or until golden brown.
15. Make Glaze: In a small bowl, whisk together powdered sugar, milk, and vanilla extract until smooth.
16. Cool and Glaze: Remove the rolls from the oven and let them cool slightly before drizzling the glaze on top.

Follow these steps, and you’ll have the most incredible One Hour Cinnamon Rolls to indulge in!