I used this one with some small alterations. I didn't know what butter powder was so I just guestimated an amount of butter (earth balance). I'd say I used about 3 tablespoons. I also love garlic alot so I added about 2 large cloves of smashed and finely chopped garlic. Scallions (green onions) also made a nice addition (I used about 5 or 6 but I really love scallions).
Corn starch if you have it mixed with a little water and then dumped into the mix while heating it up is a good thickener and I think it cinced the authenticness.
I blended everything together except the broth first and then put it in a sauce pan and heated it on low and stirred for awhile and seasoned to taste :)
It was delicious and my boyfriend who thinks I'm nuts now knows that tofu can be good.