ID Request: Pestle Puffballs (I think)

More pictures available if needed. I broke a few open that were in rougher shape and they are solid white and spongy all the way through. Found in open woods in West Kentucky.

Thinking about frying these up and seeing how they taste but want a bit more assurance that I'm not taking a huge risk doing so. I couldn't find these in my National Audubon Society Field Guide so I'm a bit reluctant to take the chance.