Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper.
In a mixing bowl, whisk together the flour, baking powder, and salt.
Cut in the cold butter using a pastry cutter or fork until the mixture resembles coarse crumbs.
Gradually add the milk, stirring until the dough comes together.
Turn the dough onto a floured surface, knead gently, and roll out to 1-inch thickness.
Use a biscuit cutter or glass to cut out biscuits and place them on the prepared baking sheet.
Bake for 12-15 minutes or until golden brown.
Heat a large skillet over medium heat. Add the sausage and cook, breaking it into crumbles, until browned and fully cooked.
Sprinkle the flour over the cooked sausage and stir until the flour is absorbed. Cook for 1-2 minutes to remove the raw flour taste.
Gradually whisk in the milk, stirring constantly to prevent lumps.
Bring the mixture to a simmer and cook for 5-7 minutes, or until thickened.
Season with salt, pepper, and optional spices to taste.
Split the warm biscuits in half and ladle the sausage gravy over the top. Serve immediately.