Toilet cakes are great for "over the hill", plumbers, potty training and many other sick celebrations ;). If you follow these instructions you will have a cake with about 30 servings.
You will need:
9X13 cake (filled)
A sturdy board (mine is plywood)
2- 8" foam squares
8" half circle of foam (found in craft section)
Chocolate candy with nuts! (you know where this is going don't you?)
8" round pan
large fruit can (empty and clean)
8" round cardboard circle
These are the foam 1/2 circle and the 8" cardboard circle. Cover the dome with buttercream then fondant. Cover each side of the circle with buttercream and fondant. Write "Everything turns to crap at 40" on the circle. (or whatever endearments you wish)
Attach the 2 pieces of styrofoam with toothpicks and stick dowels or plastic hollow rods into the styrofoam. This is the cake cistern. Cover it with buttercream then fondant.
Place clean can in center of 8" round pan and grease. Fill with batter and bake as usual. You will have to place something inside the can to weigh it down. I used a bowel on tip, but a glass jar or glass would work. I also filled a mini dome pan with batter to make a plunger and a coffee mug to make toilet paper. This is where you can get REALLY creative!
The 8" cake will become the toilet lid. Place on a cardboard circle and cover with buttercream and fondant. The toilet paper and plunger dome should also be covered with buttercream and fondant. (obviously the plunger needs to be plunger colored)
Place 3 wooden dowels at the peak of the dome and press peak side down into 9x13" cake. Place the 8" round cake with the cardboard for a bottom on top of the dome base. Be sure to secure it with royal icing. Now press the cistern into the 9x13" cake and add another dowel from the cistern into the styrofoam dome. This will keep the cistern from falling backwards. The 8" cake is NOT strong enough to support this weight so it must go from foam to foam.
Fill the tank bowl with frosting. Melt the nutty chocolate you chose slightly and mold into "turd" shapes. Add these to the bowl. Attach the cardboard toilet lid with toothpicks into the seat and royal icing in the seat and the cistern. Add the toilet paper and plunger to complete the picture but remember to secure them with royal icing.