Absolutely any mushrooms you like! I used a blend of white button mushrooms, criminis (baby bellas), shiitake, and oyster mushrooms. You could also use portabella mushroom caps (remove the stem and scrape out the gills before using), porcini, enoki, or chanterelle. If you're into foraging, you can use those mushrooms too (seriously don't forage mushrooms unless you REALLY know what you're doing!). To keep the cost minimal, use all white buttons. It will still be great! If you are including a smaller or more delicate mushroom, like enokis, add them at the same time you add the beans so they don't disintegrate to nothing.