Stovetop: Pour into a heavy bottomed saucepan and heat over medium-low heat, stirring frequently to prevent scorching until hot, roughly 10-15 minutes. Add your turkey pan drippings to the gravy to give it added richness and flavor.
Microwave: Pour into a microwave-safe container and cover loosely with a microwave safe lid or paper towel. Heat on high for 2-3 minutes until hot. Stop and stir every 60 seconds to ensure even heating.