How to cook mushroom soup like the Campbell's Mushroom soup?

I make a soup mix that is very similar to Campbell's Mushroom soup and I use it all the time to substitute in recipes. It's very quick and easy and so much cheaper. Here is the recipe: Cream Soup Mix 2 cups dry milk 3/4 C corn starch (argo) 1/4 C chicken boullion powder 1/2 teaspoon dry thyme 1/2 teaspoon dry basil 1/2 teaspoon dry parsley 1/4 teaspoon garlic powder 1/8 teaspoon onion powder Put all ingredients in a gallon plastic zip bag and shake up to mix. To use the mix, mix 1/3 cup cream of soup mix with one cup water and heat over medium high heat until it thickens, use a wisk to stir. Add mushrooms or chicken if desired. Hope this is what you are looking for.