Preheat the Oven: Set your oven to 425°F (220°C). Prepare a baking sheet by lining it with parchment paper to prevent sticking.
Mix the Dry Ingredients: In a large mixing bowl, combine the all-purpose flour, baking powder, salt, and baking soda. Whisk these dry ingredients together until they are well blended.
Incorporate the Butter: Add the cold, cubed butter into the flour mixture. Use your fingers or a pastry cutter to mix until the mixture resembles coarse crumbs, ensuring the butter is well-distributed.
Form the Dough: Gradually pour in the buttermilk. Stir gently until the dough just starts to come together—avoid over-mixing to keep your biscuits tender.
Shape the Biscuits: Turn the dough out onto a floured surface and pat it into a rectangle about 1 inch thick. Fold the dough over itself 2 to 3 times to create flaky layers. Use a round biscuit cutter to cut out your biscuits and place them on the prepared baking sheet.
Bake the Biscuits: Place the biscuits in the preheated oven and bake for 12-15 minutes, or until they are golden brown on top and have risen beautifully.
Cook the Sausage: While the biscuits are baking, heat a large skillet over medium heat. Add the breakfast sausage, breaking it up with a spoon, and cook until it is fully browned and crispy, about 5-7 minutes.
Prepare the Gravy: Once the sausage is browned, sprinkle 3 tablespoons of flour over the cooked sausage, stirring to combine. Cook this mixture for an additional minute to eliminate the raw flour taste.
Make it Creamy: Gradually whisk in the milk, stirring constantly as you do so. Continue to cook until the mixture thickens into a rich, creamy gravy. Season generously with salt and freshly ground black pepper.
Serve and Enjoy: Once the biscuits are baked, remove them from the oven and carefully split them in half. Generously ladle the sausage gravy over the top of the biscuits.
Notes
For a charming presentation, garnish the dish with freshly chopped parsley.