Check your Target store for Pillsbury Halloween Funfetti cake mix in the Halloween clearance. Pick these up for only $.12 with the Target printable coupon.
They used to make these were there was a little packet to add the sprinkles, but now they are mixing them in with the cake mix.
Pillsbury Halloween Funfetti Cake Mix $.62 – Buy 2 (clearance 50% off)
$1/2 Target printable coupon
Final Price = $.12