Fluffy, comfirting anf delicous bakery style cinnamon rolls.
Line a half-sized baking sheet with parchment paper and set aside.
In a large saucepan, heat the milk, butter, and sugar until the butter has melted and the sugar has dissolved.
Remove from the stove and allow it to cool.
Pour milk mixture into a bowl of a standing mixer and add 2 cups of flour, egg, egg yolk, yeast, and salt.
With the dough hook attachment on and on low speed sprinkle the rest of the flour. Knead for 5 minutes then leave to rest until double in size. About 1-2 hours.
Mix the filling ingredients together until smooth. Set aside.
Place dough on a clean surface sprinkled with some flour and roll into 13"18" sized rectangle.
Spread the filling and tightly roll up the dough starting with the end close to you.
Cut the log into 12 even slices and place each slice on the prepared baking pan, spiral design facing up (while it's bottom side is facing down).
Allow resting for an additional 2 hours then bake for 30 minutes in a 350F preheated oven.
While the rolls are baking make the frosting by mixing the ingredients in a medium-sized bowl.
Once out of the oven drizzle with the frosting and serve.