Make sugar cookie dough per your instructions. Cut cookie dough in half.
Add a few drops of food coloring in the other half and mix.
Roll out each half of the dough, about 1/4 inch thick.
Place a little water on the colored dough, just a few drops to act as a glue
Place the plain dough on top of the colored dough
Gently roll two doughs together and trim to a rectangle
Begin rolling the dough until you have a large roll (log)
Pat and mold to form a solid roll, then roll into sprinkles
Wrap in plastic wrap and refrigerate for 1-2 hours
Slice cookies in 1/4 thickness
Place on baking sheet and bake at 350 degrees for 8-10 minutes
Cool on wire rack