If you’d rather skip fussing with pan drippings or gizzards, this mushroom gravy is the perfect addition to your Thanksgiving table. Mushroom Gravy IngredientsMushrooms: Fresh cremini mushrooms give this gravy earth notes, while dried porcini add deep umami flavor. Mushroom Gravy VariationsFor vegan gravy: Use a plant-based butter or a few tablespoons of a neutral oil in place of the butter to make a plant-powered gravy that’s just as silky and flavorful. Mushroom gravy freezes well for up to three months. Can you make gluten-free mushroom gravy?