Preheat oven to 400 degrees Fahrenheit; grease a 9x13 baking dish.

Brown sausage in a skillet; stir in flour, then whisk in milk to make thick gravy. Season heavily with black pepper.

Arrange frozen biscuits in one layer in dish; do not thaw first.

Pour hot gravy over frozen biscuits.

Bake 30 to 35 minutes, until biscuits are golden and centers cooked through.