An easy Cream of Mushroom Soup recipe that will make mushroom-lovers happy, especially the ones doing the cooking since it only takes 15 minutes to make. To have this soup ready in under 15 minutes, first read through the recipe. As you read gather together all of the ingredients and all of the tools, pots, pans, etc. that you will need so that everything is at your fingertips. There is no need to prep any of the ingredients though. All prep is part of the instructions and is counted in the 15 minute time. Yield 8 cups