Portobello mushrooms Home › Forums › Decaffeinated Coffee › Portobello mushrooms This topic has 3 replies, 3 voices, and was last updated 9 years, 5 months ago by ☕️coffee addict. Viewing 4 posts - 1 through 4 (of 4 total) Author Posts July 2, 2015 9:37 pm at 9:37 pm #615943 Torah613TorahParticipant Do you clean out the black stuff from the inside? Why or why not? July 2, 2015 9:52 pm at 9:52 pm #1089944 JosephParticipant What are portobello mushrooms and what kind of black stuff is inside it? July 2, 2015 9:53 pm at 9:53 pm #1089945 Torah613TorahParticipant They are big, delicious, fancy mushrooms, and I have recently been told that scraping out the insides is required. July 2, 2015 9:58 pm at 9:58 pm #1089946 ☕️coffee addictParticipant the workers at my work clean it out i was told its in fertilizer that’s why you clean it out Author Posts Viewing 4 posts - 1 through 4 (of 4 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In