I can’t take credit for the idea because I saw this on another site and attempted to re-create it. For the cake I used a Devils food cake mix in 8 inch pans. The frosting is a peanut butter frosting. The mud is chocolate ganache. The hot tub is made of 12 full Kitkat bars broken in two. I used some of the frosting to secure the Kitkats to the cake, then tied a ribbon around to hold it all in place.
The pigs are made from white chocolate marshmallow fondant I made myself and colored. The fondant tastes much better than traditional fondant and it is easier to work with.