Preheat Oven:
Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper or lightly grease it.

Make the Dough:
In a medium bowl, mix together cake mix, eggs, vegetable oil, and vanilla extract until a thick dough forms.

Add Mix-Ins:
Fold in about half of the red and green sprinkles, and any optional add-ins like white chocolate chips or M&M’s.

Shape the Cookies:
Scoop tablespoon-sized balls of dough and place them 2 inches apart on the prepared baking sheet.

Decorate:
Gently flatten each dough ball with your fingers and sprinkle more festive sprinkles on top.

Bake:
Bake for 9–11 minutes, until the edges are set but the centers are still soft. Do not overbake.

Cool & Serve:
Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack. Serve or store once fully cooled.