Preheat oven to 350 degrees.
Brown sausage in a medium skillet over medium heat, breaking it apart into small pieces as it cooks.
Remove sausage and place in a 9x13" baking pan, reserving the drippings in the skillet.
If you don't have ¼ cup of fat drippings in the skillet, add butter until you have the proper amount.
Set heat to low and sprinkle in flour, whisking it continually with the fat to form a roux. Cook for approximately three minutes while stirring.
Add milk a few splashes at a time and whisk into the roux. Repeat until all milk has been added.
Let gravy simmer until slightly thickened, then add salt and pepper and pour over sausage in the baking pan.
Cut biscuit dough into halves and quarters and place on top of the gravy.
Place in the oven and bake for 20-25, or until biscuits have cooked though.