In the bowl of your stand mixer, mix the yeast and warm water together.  Allow to sit for about 10 minutes, until mixture looks frothy.

Add 3 tablespoons butter, sour cream and sugar to yeast mixture and mix with the paddle attachment for about 30 seconds.  Add the salt and one cup of the flour and mix well.

Switch to the dough hook attachment and continue adding 1/2 cup of the flour at a time until a ball forms and then continue mixing on medium high for about one minute [you may not need the full 4 cups of flour, so you will have to eyeball when the dough has all come together].   Cover the bowl with a dishtowel and set it in your oven or warming drawer on the Proof setting.  {If your oven or warming drawer does not have this feature, simply set it in a warm place}.  Allow dough to double in size, about one hour.

Punch dough down and lay it out on a well-floured surface.  Dough will probably feel tacky, so add a little additional flour so that it can be rolled out into a 9" x 14" rectangle {about 1/2 inch thickness}.

Smear a coating of butter over the top of the dough {about 2 tablespoons or more if nobody is watching}  Sprinkle the dough evenly with the cinnamon-sugar mixture.  Sprinkle nuts evenly over dough, if using.

Starting at the bottom of the rectangle, begin rolling the dough upward, being careful to roll evenly.  When roll is complete, pinch the last 1/2 inch of the end into the roll so that it stays together while you are slicing.

Carefully slice the roll into 1 inch pieces.  Place each piece on a greased {buttered} baking pan, leaving about 1/2 inch of space between each roll.

Gently put a kitchen towel over rolls and place baking pan back into the oven/warming drawer/your favorite proofing spot and allow to rise for about another 50 minutes-1 hour.

Preheat oven to 375 on Convection Bake setting {or Bake at 375 if your oven does not have that feature} and bake cinnamon rolls for about 10 minutes {or until beautiful and golden in color}.

Remove rolls from the oven, lightly brush a little butter over the tops and allow to sit for about 5 minutes.  Whisk together icing ingredients, drizzle icing over the top of each and serve immediately.  These cinnamon rolls will diminish any amount of willpower you think you have....don't say I didn't warn you.

Happy Easter to all my Peeps!  Pun {most definitely} intended.