Slipper mushrooms are not hazel mushrooms. They both belong to mushrooms, which are very nutritious ingredients, and although both are mushrooms, they have different textures, appearances, and biological properties. Hazel mushrooms have a tougher and crunchier texture, while slipper mushrooms have a more tender taste. Slider mushrooms are also known as Phosphorus umbrellas, and slider mushrooms are named after the mucus on the surface of their caps. Hazel mushrooms are umbrella shaped, light earthy yellow, and brown when old.