Classic Chicken Fried Steak

5. For the gravy, reduce the heat to medium and in the same skillet, use about 2 tablespoons of the reserved frying oil. Sprinkle in the flour and whisk for about 1 minute. Gradually pour in the milk, continuing to whisk to prevent lumps. Season with salt and pepper. Cook until the gravy has thickened, about 5-6 minutes.