Several years ago we cut out the "cream of" soups a long with a bunch of other things. It was a great decision for our health but cut back our recipes. For whatever reason it took me forever to actually make my own. It's so simple. I just used the recipe from Pinch of Yum. It makes 3 cups of condensed soup.
2 1/2 cups chicken broth
1 1/2 cup milk
3/4 cup flour
Put the chicken broth and 1/2 cup of milk in a sauce pot. Bring to a boil and turn down heat to the lowest setting. Whisk together the flour and remaining milk until it's lump free. Whisk the flour mixture into the chicken broth mixture and continue whisking until it's thickened up. Remove from heat and use as desired.