Happy Day of the Mushroom! Today, celebrate the diverse types of edible mushrooms there are: portobello, white button, cremini, oyster, shiitake, enoki, and porcini, to name a few. Prior to the 1940s, there wasn’t such a wide array of mushrooms to choose from. The most common variety for purchase were brown cremini mushrooms. Mushrooms offer texture to vegan and vegetarian dishes, giving them a hearty and “meaty” taste and appearance.