Almost definitely puffballs, one of my favorite mushrooms to forage. Though I’ve never had ones this big and I hear they lose a bit of flavor if they’re giant.

If you cut a *(vertical) cross section and it’s a uniform texture with nothing that looks like the structure of a classic capped mushroom that should rule out any lookalikes. Should still be good if the inside is white and not starting to turn brown.

Are they puffballs?