Lightly grease a 9x13 inch baking dish and set aside.
Cut each biscuit in half. Bake one-half of the biscuits and arrange them in the prepared pan. Set aside the remaining uncooked halves.
1 package refrigerated biscuits
Cook the sausage in a skillet over medium-high heat until fully browned. Drain the excess grease.
1 pound ground breakfast sausage
Stir in the flour, mixing until the sausage is well coated. Lower the heat to medium and cook for 3-5 minutes, stirring frequently.
3 tablespoons all-purpose flour
Add the milk, beef broth, salt, and pepper, stirring until the mixture comes to a gentle boil. If the gravy is too thick, add a little more broth to reach your desired consistency.
2 ½ cups milk, 1 cup beef broth, Salt and pepper
Pour the sausage gravy over the baked biscuits. Layer the remaining uncooked biscuit pieces on top - brush them with a bit of milk.
Place the dish in the air fryer and bake at 190ºC (380°F) for 15 minutes, or until golden brown. If the top starts to brown too quickly, cover it with foil for the last 5 minutes.
Serve and enjoy.