Bake biscuits as directed on can.
Meanwhile, in 12-inch nonstick skillet, crumble sausage; cook over medium-high heat about 5 minutes, stirring frequently, until no longer pink.
Using whisk, stir in flour. Gradually stir in milk. Heat to boiling; boil 3 to 4 minutes, stirring constantly, until mixture thickens. Split warm biscuits; top with sausage mixture.