Preheat the oven to 350 degrees. Coat a baking sheet with cooking spray.
In a large bowl, combine the cake mix, dry vanilla pudding, eggs, butter and milk – it will be VERY thick
In a small bowl, combine equal amounts of the red & green sugars. You can also do two separate bowls of each color & make all red or all green cookies. Or do a little of each & go for a tye-die look :)
Scoop the dough into tablespoon sized balls. Roll the dough in the decorating sugars, being sure to fully coat the dough. Place the coated dough on the baking sheet about 2 inches apart.
Bake for 8-10 minutes or until the cookies are set.
Cool for just a minute or two on the baking sheet and then remove to a wire rack to cool completely