Bring all ingredients to room temperature.
In a large bowl, whisk together the dry ingredients, except yeast. Cut the shortening into small pieces and cut into the dry ingredients with a dough paddle attachment on an electric mixer or a pastry cutter by hand.
In a smaller bowl, stir together the liquid ingredients until combined. Slowly add liquid mixture to the dry ingredient bowl and mix with the paddle attachment. Add in the yeast, mixing on medium-high until smooth. The dough will be sticky, but firm.
Preheat oven to 200º F, then turn off. Prepare two baking sheets by lining with parchment paper and setting aside.
Liberally dust a clean counter or pastry mat and your hands with gfJules Flour. Turn the dough out onto the well-floured surface and divide into 8 equal pieces. Gently roll each piece into a log, at least 12 inches long.
Brush off excess flour, then roll into a bun and transfer to a prepared baking sheet. Repeat with remaining dough.
Melt the butter and brush over each roll. Add topping sugar and cinnamon to remaining melted butter and spread on top of the edges of the buns so that it melts between the folds of dough.
Cover with an oiled piece of parchment and set aside to rise in the warm oven for 30 minutes.
Once risen, remove from the oven and preheat the oven to 350° F (static) or 325° F (convection). Uncover buns and bake for 14-16 minutes, checking with a toothpick to see that no wet dough is sticking to the toothpick before removing to cool on wire racks.
Once cooled, prepare icing by whisking confectioner’s sugar and only enough milk to make a drizzling consistency, then spoon across the tops of the buns, if icing is desired.
Yield: 8 large cinnamon buns.