In a small saucepan over medium heat, add milk and saffron. Bring the temperature to 120ºF.
Add honey, stir well and remove from the heat. Pour the mixture into the bowl of a stand mixer and let it cool until the temperature reaches between 105ºF to 110ºF.
Add yeast, stir well and let it proof for 15 minutes.
In a medium bowl, add 4 cups flour, sugar, cinnamon, nutmeg, and salt; whisk to combine and set aside.
When yeast is active, add butter, sour cream and beaten eggs. Using the paddle attachment, process on medium speed until nicely blended.
Switch to dough hook attachment and add half dry ingredients. Process on low speed until somewhat mixed before adding the remaining half.
When mixed, increase the speed to 3 and knead until the dough pulls away from the sides of the bowl, adding by the tablespoon the remaining ½ cup flour.
Increase the speed to 4 and knead for 4 minutes. Grease a bowl lightly with oil; set aside.
Transfer the dough to a work surface and form a ball by pulling under. Place it in the prepared bowl, swirling around to coat.
Cover with a clean dish towel and transfer the bowl to a draft-free area such as the oven with the temperature off. Let it rise for 1 ½ to 2 hours or until it doubles in size.
A couple hours later, remove it from its draft-free spot and drop the dough back on the work surface. Form 14 balls of about 2-inches in diameter.
Cover them with the towel while working with one at a time.
Roll the ball out into an oblong shape, about 15 inches long. Curl the ends in opposite directions forming an “s” with coils on both ends.
Place it on a large baking sheet lined with parchment paper. Set aside while doing the others.
Cover them with the towel and let the buns proof for 45 minutes or until they double in size.
Preheat oven to 400ºF.
Brush egg wash on tops and sides of buns and place a raisin in the center of each coil.
Transfer to the preheated oven and bake for 10 to 12 minutes or until the buns are golden, rotating the baking sheet halfway through cooking.
Remove from the heat and let them cool slightly before serving. Makes 14 large buns