Substitute rice milk for the soy milk if desired.
This sauce is meant to be rather thick, but extremely flexible. If it is too thick for what you intend to make, then add more of your milk or water to thin it out. Like Velveeta(R), this creamy sauce likes to thicken and clump when it cools. To fix this, just pop it in the microwave and reheat. I have heard that it tastes better the next day. However, mine has never stuck around long enough to find out!