Keto Mushroom Soup is rich and creamy. You will never buy canned mushroom soup once you taste this homemade cream of mushroom soup. This easy keto soup recipe is the perfect first course to a nice dinner or is a great entree all on its own. I love love love mushrooms. Stuffed, grilled, roasted, raw, on pizza, in soup, and any other way you can think of. Fortunately, my husband also loves mushrooms. Last week, I whipped up this keto mushroom soup and it blew our minds on the flavor factor.