Looks simple enough, right?
With as straightforward an ingredients list as that, it was worth trying. Most people probably already have those items on hand. The only thing is... as is, that recipe makes one cup of liquid. That's NOT enough to cover two rough feet! I quadruple that and get a whopping two cups of liquid. It is sufficient.
Just like it says, soak those babies for ten minutes.
After the soak, with your feet still wet, you'll find it rather quick and easy to use a pumice stone. In no time you'll have smooth, minty fresh feet.