Make biscuits. While they are baking, prepare the sausage gravy.
1 batch [buttermilk biscuits]
Break up sausage in a large cast skillet over medium-high heat. Cook until browned. Do not drain the grease unless there is more than 2 tablespoons or so.
1 pound breakfast sausage
Reduce heat to medium, then sprinkle the flour over the sausage, stirring until absorbed, about 1-2 minutes. Season with the salt, pepper, thyme, and garlic powder.
6 Tablespoons all-purpose flour, 1/2 teaspoon kosher salt, 1/2 teaspoon black pepper, 1/4 teaspoon dried thyme, 1/4 teaspoon garlic powder
Gradually add the milk, stirring constantly until thickened to your liking, anywhere from 3 minutes to 8 minutes. If the gravy gets too thick, add a little additional milk to thin it out.
3 cups whole milk