Summarize this article:

Keep the skillet on the stove over medium-high heat. The drippings and grease from the ham should still be in the skillet. Pour in 1/2 cup (120 ml) of strong black coffee into the skillet. Use a wooden spoon to stir the drippings and coffee well. Use caution when pouring in the coffee. It will probably sputter and foam a little as you add it to the hot drippings. Pour in 1/2 cup (120 ml) of water and stir the red eye gravy well. If you'd like to remove a little of the bitterness, add a 1/2 teaspoon of sugar. Let the gravy cook for 3 to 4 minutes until it becomes a little syrupy and cooked down. You can serve the red eye gravy or thicken it a little. To thicken it a little, add 1 tablespoon (14 g) of unsalted butter and whisk the gravy for one minute. Plate up your fried country ham and set out a small ramekin or gravy boat full of the red eye gravy. This way, you can portion out as much gravy as you like. Red eye gravy also goes well with:  Biscuits Fried eggs Steak
Add coffee to the drippings. Stir in water and sugar, optional. Serve the red eye gravy.