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.
Easy to check against another source. This is one of the easiest to ID mushrooms that people eat.