Preheat oven to 350°F.
Cook sausage over medium heat in a large cast iron skillet (or oven safe skillet), breaking it up into crumbles as its cooks.
Once sausage is fully cooked, remove it from the skillet onto a paper towel lined plate to drain off any excess fat. Set aside.
Add four tablespoons butter to the skillet.
When the butter has melted, sprinkle flour in the skillet over the buttter.
Stir the butter and flour together. Cook for 1-2 minutes to cook off the raw flour taste.
Slowly whisk in milk and stir to remove lumps.
Return the cooked sausage to the skillet.
Season with freshly cracked black pepper. Stir to combine all the ingredients.
Stir in more milk if gravy gets too thick.
Remove the skillet from heat.
Top with a layer of biscuit pieces.
Place skillet in the oven and bake for 30 minutes or until gravy is hot and bubbly and biscuits are golden brown.
Serve with a side of scrambled eggs to round out the meal.