Preheat your oven to 350°F (175°C) and prepare a baking sheet by coating it with cooking spray or lining it with parchment paper.

In a large mixing bowl, combine the white cake mix, vanilla pudding mix, eggs, softened butter, and milk. Blend until a thick, uniform dough forms.

In a separate bowl, mix equal parts of red and green decorating sugars.

Scoop portions of the dough and roll each into balls. Then, roll the balls in the decorating sugars until fully coated.

Arrange the sugar-coated dough balls on the baking sheet, leaving about 2 inches between each.

Bake the cookies for 8-10 minutes until slightly golden at the edges with a soft center.

Let the cookies cool on the baking sheet for 1-2 minutes before transferring them to a wire rack to cool completely.