Gluten-free Condensed Cream of Mushroom Soup

GF CreamOfMushroomSoup

1 cup evaporated whole milk
2 Tablespoons cornstarch or 2 teaspoons xanthan gum  
1 Tablespoon vegetable oil
1 teaspoon onion powder
1/3 teaspoon salt
1/8 teaspoon  pepper
1 pinch  sugar
1 1/2 teaspoons  chicken base
3/4 cup fresh mushrooms – about 2 ounces – chopped    

Mix all ingredients except for the mushrooms.  Stir over medium high heat until thickened as much as a can of Campbell's cream of mushroom is.  Add mushrooms and stir.  Use in recipes calling for regular cream of mushroom soup.  This recipe is equivalent to one 12 ounce can.