Hot Cinnamon Rolls in Muffin Pan

One morning, I tried baking the normal cinnamon rolls that I make for my grand-children in a muffin pan.  And to my surprise, it turned out great.
Ingredients are the usual flour shifted with baking powder and salt, hand mix in the butter pieces, and formed into dough with cold milk.   Rest the dough, then, roll flat into rectangle.  Mix Ceylon cinnamon with sugar.  Rub the surface of the dough with soft butter, then, sprinkle with cinnamon mixture.     Roll up the dough and cut into the size to fit in the muffin mold.  Bake at 350'F till 'soft' golden brown.     Drizzle with optional frosting made with powder sugar and milk.