View source for Cream of Mushroom

    * 2 TBSP butter
    * 24 oz of mushrooms, half sliced, half chopped
    * 2 TBSP butter
    * 1 medium yellow onion, chopped
    * 1/4 cup flour
    * 1.5 cup water
    * 1 cup of heavy cream
    * Salt & pepper (to taste)
    * Parsley, chopped

In a medium pan, melt 2 TBSP of butter.  Add the sliced mushrooms and saute until they’re softened (about 4-6 minutes) on medium heat (at no point during this recipe, should your ingredients ever boil — boiling is not good).  Remove from the pan.

Put another 2 TBSP of butter and add the chopped onions and the chopped mushrooms on medium heat.  Cook until the onions are soft. 

Now put 1/4 cup of flour in the pan and stir constantly to thicken the onions and mushrooms

Add water and cream

notes: 
* 1/4 cup flour is enough
* use water instead of chicken stock. just as good
* 4.5 pinches of salt

http://whereindc.wordpress.com/2008/09/29/cream-of-mushroom-soup-recipe/