Meanwhile, in the bowl of a stand mixer
, combine 4 cups flour, brown sugar spices and salt. With mixer on low, slowly add yeast mixture, molasses, melted butter and egg. Increase speed as needed. Add additional flour as needed, one spoonful at a time, until dough forms a smooth ball. Transfer dough to a lightly greased bowl. Cover and allow to rise in a warm location until doubled in size, roughly 1 hour.