To prepare the dough

1. Combine the sugar, cardamom, butter, evaporated milk, and salt in a medium sized saucepan, and, stirring occasionally, heat over medium heat until the butter has just barely melted. Remove from the burner and allow to cool to warm.
2. In the bowl of a stand mixer, sprinkle the yeast over the warm water and allow to dissolve. You can gently stir it after a few minutes if not all of the yeast has been dissolved. Once dissolved, add 3 cups of flour, the sour cream, eggs, and warm butter mixture to the yeast. Stir until well combined and then begin to the remaining flour while mixing on low speed. You may only need about 6-1/2 cups of flour total, or as much as 7-1/2 cups, but add it until the dough is able to pull away from the walls of the stand mixer. It will still be quite sticky, even sticking to unfloured fingers quite easily, but be sure to not add too much flour as this can make the rolls tough. Switch to the dough hook and knead the dough for 4 minutes on medium speed.
3. Grease a large bowl with cooking spray, butter, or oil, and place the dough in there, covered tightly with plastic wrap. Allow it to rest for about 1-1/2 hours, or until the dough has doubled in size. If the dough is not growing after about an hour, be sure your bowl is in a warm, draft-free spot in your kitchen.
4. Once doubled in size, prepare the cinnamon filling by combining the butter, cinnamon, and sugar in a small bowl by smooshing it into a paste with the back of a fork or a rubber spatula. Preheat the oven to 350 degrees and prepare 2 sheet pans lined with parchment paper.
5. Sprinkling a good bit of flour on your work surface for rolling the dough and then remove half of the dough from the bowl. Roll it out into a rectangle approximately 9″x20″, adding small bits of flour as needed to keep the dough from sticking to the surface or the pin. Spread half of the filling evenly on the dough leaving a 1″ border around the perimeter of the rectangle. Fold the dough in half lengthwise to form a 9″x10″ square and roll or pat it out to thin the folded dough a bit. Using a sharp knife, cut 1/2″ strips of dough (approximately 12 total). Take one strip of dough and wrap it around your index and middle finger twice. Remove the double loop from your fingers and tuck both ends of the dough back through the center loop to form a bit of a twisted knot. Place each knot on the prepared sheet about two inches apart, being sure to keep the loose ends on the underside of the bun. Repeat this entire process with the second half of dough and then cover both sheet pans with plastic wrap to rest for about 15 minutes. Bake in the preheated oven for 20 minutes or until golden brown. Allow to cool while you prepare the glaze.

To prepare the glaze

1. Using a whisk, combine all ingredients in a medium sides bowl, stirring until it is uniform in consistency. You can warm it for about 10 seconds in the microwave to make a more pourable glaze, or add a teaspoon or two of cream to thin it out. Drizzle the glaze over your warm or cooled rolls and enjoy!