Preheat oven to 350 degrees. In a large bowl, mix together the cake mix and baking powder. In a small bowl, mix together the eggs, oil and vanilla. Add the egg mixture to the cake mixture and stir to combine. Stir in the sprinkles. Drop by spoonfuls onto a cookie sheet.
Bake for 8 to 10 minutes. Allow to cool for about 5 minutes on the cookie sheet before transferring to cooling rack. They will be very soft at first but will harden as they cool even more.