The liquid left in the slow cooker is full of flavor and can be used as a base for gravy (or as a flavorful broth for soups). To make gravy from the pan drippings - or in this case slow cooker drippings, use my Foolproof Gravy recipe and I suggest halving it. Gravy from Slow Cooker Juices and Drippings: But to make things even simpler - add 2 tablespoons butter to a saucepan, melt it over medium heat, sprinkle with flour to create a roux, whisking for 1 minute. Pour in the cooking juices and drippings (strained if desired) from your slow cooker, whisk them with the roux, and add additional chicken broth (about 1 cup), or as desired for consistency. Simmer your gravy for another 5 minutes, whisking nearly constantly. Season with additional salt, pepper and other herbs and spices as desired.