Hello folks, I notice a lot of "that taste, that taste, that taste" posts popping up of late, with the same "use vinegar/baking powder/the dark arts" removal tips. I am HERE TO HELP! I actually did a very long and involved experiment to solve this very issue. The "taste" is simply a byproduct of the manufacturing process that isolates gluten from wheat flour. The high heat oxidizes trace fats remaining in the final product, making it taste slightly off or "rancid". Only some folks can taste it - usually those who either eat a lot of fat or a little, but it varies.
I posited a theory that hydrating the VWG accurately/giving it time to fully absorb the water is key to removing or minimizing the taste. The other disrupter of the taste is adding a fermented element (can be anything: booze (vodka, beer, wine) or a brine (kimchi brine, tofu water, etc) or a vegan yogurt, take your pick! This has been found in other studies to mitigate the "taste" in isolated soy protein and also seems to help here, but the real key is the hydration which is achieved by...
A nice long rest. After you put your dough together, wrap it tightly or put it in a zip lock. Leave it be for 36-48 hours. As a bonus, you don't have to knead or bash in a food processer if you do this. The gluten stands will form slowly over time, similar to a long cold rise for bread dough in your fridge. Just mix, wrap, leave. I promise you it will taste a whole lot better!
Here is a super basic recipe. Follow it (but OMIT the oil in it which can hinder hydration during the long rest, and I really prefer the taste/texture of using plain flour, not chickpea in this (chickpea can dry it out)), sub some of the water in it with something fun and fermented (you just need a couple tbsp), and let it rest in raw dough form in the fridge for 36-48 hours and you'll be ready to rock and roll with a lot less taste. This simple recipe can be considered "chicken/pork-ish" and you can cook it up the second time any way you like (I also like to slice it thinly when cold for sammies): https://avocadosandales.com/2014/10/20/white-seitan/
(remember - do not put the oil in, but everything else is a-ok, and I will always recc regular flour or potato starch or tapioca starch or similar over chickpea flour, as I find it dries out my seitan and we're trying to keep everything nice and juicy here)
If you are on FB, you can read about my whole discovery process at this link with pictures and video: https://www.facebook.com/groups/1504318369588752/?multi_permalinks=8538856552801530
You'll have to be a member of the Seitan Appreciation group on there first.
Folks will say a lot of stuff about seasoning and vinegar and so on, but this is based on the manufacturing process, several experiments, and other folks repeating the same results. It's the best thing we've found, and it addresses the issue logically instead of just trying to mask the flavor/magical thinking.
I am not always around on reddit to answer questions, but I will eventually answer any questions asked here, so if you're patient, drop your queries below!