In a large saucepan over medium-high heat, preheat olive oil. Add mushrooms and cook for about 4 to 6 minutes, until they release most of their liquid.
Stir in Umami Blend, garlic powder, onion powder and black pepper.
In a small bowl, whisk almond milk and tapioca flour. Add milk mixture and vegetable broth to saucepan.
Bring to a boil, reduce heat and cook for about 2 to 3 minutes, until soup has thickened. Add salt to taste.
Into a high speed blender or food processor, transfer half of the soup and pulse a few times until creamy. Pour back into saucepan, stir to combine, and serve.