Flour – How to know if stone-ground flour is truly milled with stones

Typical all purpose flour does not include the germ of the wheat, so if you would like to mimic the stuff from the store, you need to grind wheat without the germ (source).

By using hard white wheat and a very fine grind, I have for years made a flour that operates very like whole wheat pastry flour, which can often be substituted for all purpose flour in recipes. To make this same flour suitable for bread I add vital wheat gluten.

I think this is not such a good idea. It is going to take a lot of nutritional yeast to get anything like the thickening power of flour. If you really want to thicken this with less flour, there are plenty of other things that will do the trick, like xanthan gum, potato starch, corn starch, ultra-tex, some formulations of methylcellulose, etc. Just add however much nutritional yeast you want for flavor or health reasons, and get your thickening elsewhere.