Raina and I checked out three juices from E-juice Plus: Butterscotch, Coffee, and Menthol. These juices are available for a relatively low price of $20 for 60ml. For an additional $5, you can add ganoderma extract. Ganoderma is a mushroom that's used by many practitioners of Eastern and alternative medicine.
While I'm not going to pretend to know if vaping ganoderma extract will improve your health, I can say that it doesn't make e-liquids taste like mushrooms. We thought one of the juices was okay, liked one of them, and really liked another.
Here are the full details, juice ingredients, and steeping notes.