I made this yummy gravy with this Yummy Meatloaf, however I do NOT put the gravy on the meatloaf, the meatloaf is yummy on it's own, the gravy is for the mashed potatoes, although there are those who put the gravy on everything on their plate. However you like it, it is yummy!! I made this gravy with some inspiration from Mamie at Chewin' the Fat in the Kitchen.
4 Tbsp butter
4 cups water, divided
2 1.61 oz pkgs pioneer brown gravy mix
1/4 cup drippings from meatloaf
First chop or slice your mushrooms.