Portobello mushrooms are mature, white button mushrooms and a type of fungus. They are very low in calories and a great substitute for meat in recipes
Mushrooms absorb a high amount of water, which means it’s best not to rinse them in much water or soak them in an attempt to clean off any dirt. To remove any residue from the surface of mushrooms try using a damp cloth, rag, or strong paper towel. Gently rub the mushrooms to clean them up, being careful not to rub too hard as this can cause them to start breaking.
Once you’re done cleaning the mushrooms, pat them with a dry cloth or paper towel to let them dry — this way they don’t become overly soggy when you cook or prepare them.