I've had this at a few family functions. Here is the basic idea - I put it together on a Thursday night for a Saturday function. Hoping it doesn't get too soggy!!
Angel food cake
1 lg. Cool Whip (I used 1 1/2 regular packages)
6 Butterfinger candy bars (I used 16 fun size)
French vanilla pudding
2 c cold milk for pudding
Make vanilla pudding according to directions. Mix in cool whip. Tear angel food cake into small pieces and layer into dish or trifle bowl. Add layer of Cool Whip mixture and follow with a layer of crushed Butterfinger candy bars. Repeat ending with candy bar pieces. Must be kept refrigerated.