Cake Batter Popcorn

1 bag (3 Oz. Size) Microwave Popcorn
½ cups Butter
½ cups Dry Yellow Cake Mix
½ cups White Sugar
¼ cups Light Corn Syrup
½ teaspoons Salt
½ teaspoons Vanilla

Preheat oven to 250ºF.
Pop popcorn according to package instructions. Spread out on a greased sheet pan and remove all of the unpopped seeds.
In a saucepan combine butter, cake mix, sugar, corn syrup, and salt. Bring to a boil. Boil for 5 minutes, stirring constantly. Add vanilla to butter mixture and stir to combine.
Pour butter mixture over popcorn and stir to coat. Bake in the oven for 1 hour, stirring every 15 minutes.
Add sprinkles as the popcorn comes out the last time. Stir to combine.
Let cool for 1 hour before serving.