Cook breakfast pork sausage over medium heat until no longer pink, crumble sausage while cooking. Remove to plate and set aside. Melt bacon grease in pan, add flour then cook 3-4 minutes. Add coffee, stir one minute. Add half the milk, whisk to combine then add the second half of the milk. Add pepper, and stir until desired consistency is achieved. Add milk if it becomes to thick. Add sausage back to gravy, stir well to combine. Serve immediately over biscuits.
May refrigerate in an airtight container for up to three days. When reheating add a bit of milk to get gravy back to its regular thickness,