You can blend in a food processor if you prefer a smooth soup.
Rather than chopping the mushrooms, I sliced them because I like the texture better. I was out of Madeira, so I substituted Marsala which worked out fine. After taking the photo, I realized I’d forgotten to add the flour, so I mixed up a slurry, and the soup really turned out much creamier and a little thicker than it appears in the photo...sorry about that. Lots of layers of flavor in this soup, very nice. - 07 Oct 2015