Once the dough has doubled in size, remove the dough onto a lightly floured work surface. With a rolling pin, shape the dough into a 16 inch by 12 inch rectangle.
Spread the softened butter over the entire surface of the dough.
57 grams unsalted butter, softened
In a small bowl, stir together dark brown sugar and ground cinnamon. Then, sprinkle the cinnamon sugar mixture on the entire surface of the dough.
12 grams ground cinnamon, 150 grams dark brown sugar
Using a pizza cutter, slice the dough into 9 even stripes (1 ¾ inches wide), then roll each into a roll for a more polished look.
Place the Sourdough Sticky Buns on top of the sticky topping, about 1/2 - 1 inches apart.
Cover with plastic wrap and let rise for a second time until they have noticeably grown and look puffy. This took about 2-3 hours in my 70 degree F kitchen. The warm caramel topping helps to speed up the second rise. Not ready to bake these on the same day? No worries! Cover the shaped rolls with plastic wrap and store them in the fridge overnight. Before you’re ready to bake the sticky rolls, pull them out of the fridge and allow them to rise. This will take longer, since the dough is cold from the fridge. I like to place them in my OFF oven with just the light on. This creates a nice toasty spot for them to rise. This took about 3-4 hours.