In a large mixing bowl, beat together cream cheese and egg until smooth. Add villa and melted butter, and mix to combine.
Add half the cake mix and mix until just combined. Add remaining cake mix and mix until a dough forms.
Add white chocolate chips and M&Ms and stir in by hand.
Chill dough in the fridge for 30 minutes.
Preheat oven to 350 degrees F. Line a baking sheet with parchment paper or a silicone baking mat.
Use a cookie scoop or 1 tablespoon measuring spoon to portion dough. Place cookie dough scoops on prepared baking sheet at least 1 inch apart.
Bake for 9-11 minutes until cookies are set, but not browned.
Remove from oven and let cookies cool on the pan for 5 minutes. Then transfer to a wire rack to cool completely. Store in an airtight container for up to 1 week.