Country Gravy Like None Other
Gravy can be held, covered, in a 200 degrees F (95 degrees C) oven for up to an hour before serving. You will have to add a little more milk because it will thicken while waiting to be served.
Gravy can also be made one day in advance and just reheated over low heat, stirring occasionally, or in a 300 degrees F (150 degrees C) oven for 20 to 30 minutes. If time allows, bring to room temperature before reheating.
Gravy freezes beautifully so make a full recipe while you're at it.