Yes, every bit of them is edible, except their shirts. No, I have not eaten one yet. Just looking at them makes me happy. <3
Edit: A link to the goombas in their natural habitat: [link]\
Edit Edit: I am incredibly overwhelmed by the popularity of these muffins. I thank everybody for all the comments and views. :3 Also, I thought you'd like to see what ended up happening to these little fellows.
What a brilliant idea . I'm sure it was a delicious victory for Mario and Co. Well done
... I would eat those in two seconds :3