Preheat oven to 350 degrees. Line two baking sheets with parchment paper.
In a large bowl, whisk together cake mix and baking powder. Add butter, eggs, and vanilla. Using an electric hand mixer, beat until well combined. Fold in sprinkles.
With a medium cookie scoop (about 1 1/2 tablespoons each) scoop out dough onto prepared baking sheets, spacing cookies about 2-inches apart. Bake until lightly golden, about 12 minutes. Allow to cool completely on baking sheet.
Notes
Yield: This recipes makes 22 Confetti cookies.
Storage: Store cookies in an airtight container at room temperature for 3 to 4 days.
Freezer: Scooped dough balls can be frozen before baking. Store in an airtight container in the freezer up to 3 months (date and label with baking temperature and time). Bake directly from the freezer.