An old hand-written recipe calls for one package of "Country Herb Chicken Sauce Blend", a presumably retired McCormick product. The recipe is quite similar to this one:
https://www.cookingindex.com/recipes/38300/country-pot-pie.htm
Whatever was in this packet, it seems it was designed to be mixed with water and milk and brought to a boil to make a sauce.
We'd love to re-create the recipe. Does anyone know what was in that packet?