Hooray for mongoose, you little gem 
...can finally satisfy my curiosity and see the end result.
And may I say, OP, you're a bloody genius...
Whether by accident or design, you've created a quirky, multipurpose item, which, with a couple of tweaks as necessary, will easily solve costume dilemmas for all future Xmas/ Hallowe'en/ Easter/ Fancy Dress parties:
Xmas: exchange the red lava rivulets for white, add spots and a holly sprig = instant Xmas pudding (with sprout adornment! Perfectly in theme).
Hallowe'en: add a pointed top, repaint black, add stars & moon stickers, remove sprouts = instant wizard's hat.
Easter: repaint pastel shade, add handle, exchange sprouts for fluffy chicks (not real ones: they're lax at staying in a circle formation), fill top with decorative eggs = instant Easter basket.
Fancy Dress/ any charity competition: you've clearly got one Hell of an imagination (!), so possibilities are endless.
Great work. And thanks for providing us MNers with many laughs along the way 