Orange food coloring (or red and yellow) - gel is better than liquid, IMO
Holiday sprinkles
Parchment paper or silicone baking mats
Plastic cling wrap
Directions:
Make sugar cookie dough and separate in half. Dye one half orange and keep the other one as is.
Roll out each half of cookie dough into an 11x9-inch rectangle. I did mine on a fondant mat dusted with flour. If your dough is super sticky, roll them between two sheets of parchment paper.
Brush a little water on the non-dyed sugar cookie rectangle with a pastry brush. Carefully lay the dyed sugar cookie rectangle over the top.
Roll up the cookie dough hot dog style - you know the long edge! Take your time and keep it as tightly rolled as possible.
At this point, you may have to chill the dough for a few minutes to keep its shape. When it's cold but still flexible, brush with water (be careful not to get the water on your sprinkles. Lay out sprinkles and roll your cookie dough log in them to completely coat it. You may have to pick up and gently press some sprinkles in to fill up holes.
Once completely coated in sprinkles, wrap in 2 layers of cling wrap and chill for 3 to 4 hours. The log is way easier to slice without smushing the swirl if it's chilled for a while.
Slice log into 1/2 inch slices and place 8 to 10 slices on a parchment paper or silicone mat lined baking sheet. I used my ends but put the ugly side down LOL.
Cook in a preheated 350 degree oven for 15-18 minutes. Let rest for a few minutes before moving to a wire rack to cool completely.