01 -
Combine the cake ingredients as the box tells you, then stir in your sour cream and those chocolate morsels.
02 -
Pour the mixture into a 9 x 13 pan and cook it for as long as the cake mix label suggests.
03 -
Once out of the oven, grab a wooden spoon and poke lots of holes into the warm cake.
04 -
Keep 5 tablespoons of caramel aside, then drizzle all the rest into those holes you've made.
05 -
Stick the whole pan in your fridge and let it cool for at least half an hour.
06 -
Cover the cold cake with vanilla frosting, scatter those Butterfinger bits on top, and finish with the leftover caramel drizzle.
07 -
Grab a knife, cut into squares, and dig in right away.