-
To make the dough: Weigh your flour; or measure it by gently spooning it into a cup, then sweeping off any excess. Mix and knead all of the dough ingredients together — by hand, using a stand mixer, or in a bread machine set on the dough cycle — to make a smooth, supple dough.
-
Turn the dough into a lightly greased bowl, cover the bowl with plastic wrap, and allow the dough to rise until puffy, 1 to 2 hours. If you're using a bread machine, allow the machine to complete its cycle.
-
Transfer the dough to a lightly oiled work surface, and divide it in half. Working with one piece at a time, pat and then roll the dough into a 12" x 18" rectangle.
-
For the filling: Brush each piece of dough with 1 tablespoon of the milk, leaving a 1" bare edge along one long side. Combine the remaining filling ingredients and sprinkle them evenly over each rectangle.
-
To assemble the rolls: Working with one piece of dough at a time, start with a long edge and roll the dough into a long log (not too tightly, or the centers of the rolls will pop up during baking). Make sure to finish up at the edge that isn't brushed with milk or butter. Brush that edge with water and pull it up over the log, pinching to seal. Roll the log so it's seam-side down on your work surface.
-
Use a ruler to mark off 1 3/4" intervals, then use a serrated knife to gently cut 10 rolls from each log; you may also loop dental floss around the log at each interval and pull, which gives you a nice, clean cut.
-
Transfer the rolls to a lightly greased or parchment-lined baking sheets, leaving about 1" between each roll. These will fit nicely on a half-sheet pan.
-
Brush the sides of each roll with melted butter or vegetable oil, if desired; this makes the rolls easier to pull apart after they're baked.
-
Cover the rolls with lightly greased plastic wrap, and set them aside to rise until puffy but not doubled in bulk, about 1 1/2 hours. Towards the end of the rising time, preheat the oven to 350°F.
-
Uncover the rolls, and bake them for 30 to 35 minutes, until golden brown. Remove them from the oven, and allow them to cool slightly, as you prepare the frosting. (Cooled rolls can be well wrapped and frozen. Don't frost immediately if you plan to reheat them.)
-
To make the frosting: Using an electric mixer, beat together the butter, sugar, cinnamon, salt, orange juice, liqueur, and orange oil, if you're using it. Beat until light and fluffy, 1 to 2 minutes. The mixture should be of spreading consistency, like a soft buttercream frosting.
-
Frost the rolls while they're warm. Remove them from the pan, and allow them to cool on a rack.
-
To reheat frozen rolls: Remove the rolls from the freezer, and allow them to thaw, in their wrapping, at room temperature. This will take about 1 to 1 1/2 hours.
-
Remove the wrapping, and bake the rolls in a preheated 350°F oven for about 7 minutes, or until they're very hot. Remove them from the oven, and frost them.