creamy asparagus soup

I LOVE soup and this is one of my favorites!! It is wonderful by it self  or will compliment any meal. It is creamy, fresh and warms the soul... Enjoy!!

1/4 cup salted sweet cream butter
1 white onion, finely chopped
3 stalks celery, finely chopped
3 tablespoons all-purpose flour
4 cups water
1 cup good chicken broth
4 tablespoons chicken bouillon powder
1 yellow potato, peeled and diced small
1 pound fresh pencil asparagus, trimmed and coarsely chopped
3/4 cup real cream
1 tablespoon soy sauce
1/4 teaspoon ground black pepper
1/4 teaspoon ground white pepper

Melt butter in a heavy cooking pot. Add onions and chopped celery; saute until tender, about 4 minutes. Stir in flour, mixing well. Cook for about 1 minute, stirring constantly. Watch it carefully as it will burn and go lumpy. Add water, chicken broth, and chicken soup base; stir until smooth. Bring to a boil. Add diced potatoes and chopped asparagus. Reduce heat, and simmer for about 20 minutes. Puree soup in a food processor or blender in batches. Return to pot. Stir in cream, soy sauce, and black and white pepper. Bring soup just to boil. Adjust seasonings to taste. Serve hot. ENJOY!!