Preheat oven to 450 degrees.

Gently mix together dry mix and buttermilk until just combined. Turn out onto lightly floured surface and pat or roll dough to a 1/2 thickness. Cut into equal portions (or use cookie cutter), and place on a greased or parchment-lined baking sheet. Bake for 10-12 minutes. If desired, you may also pull biscuits out of the oven a few minutes early, drizzle with melted butter, then return to the oven to finish baking and are golden brown. Serve hot with sausage gravy.

***Buttermilk Substitute:

1 1/4 milk

1 heaping tablespoon white vinegar

Mix together milk and vinegar. Let sit for at least 5 minutes, until the milk is lumpy and curdled. Use as directed for buttermilk.