Better picture here

It looks like some variety of puffball, which can be several different species, not all of which are edible. You’d probably want to take a spore print before guessing what it is just by what it looks like.

PS – fungi is plural, fungus is singular. :)

It’s a Scleroderma (common name, “earthball”) of some sort. It’s related to puffballs, but is firmer and the flesh (spore mass) turns dark early on, whereas puffballs stay white for quite awhile.

Hmmm, that does seem to be it. I thought possibly I had stumbled on to some truffles.

I feel your pain.