Mix all ingredients in a stand mixer on speed 1 and 2 for about 30 minutes.
Let the dough bulk rise.
Spread the dough thin and add a soft layer of melted butter.
Sprinkle the brown sugar mixed with cinnamon on top.
Shape the dough and add it to a sandwich loaf.
Let it rest for a couple of hours.
Bake at 375° for 1 hour.