The Ultimate Old-Fashioned Buttermilk Biscuits: Flaky, Mile-High, & Southern Style

There is nothing quite like the aroma of fresh old-fashioned buttermilk biscuits wafting through a kitchen. Whether you’re pairing them with savory sausage gravy or a dollop of sweet peach jam, the perfect biscuit is a hallmark of comfort food. The secret to achieving those coveted “mile-high” flaky layers isn’t a family secret—it’s science. By mastering the art of cold fats and gentle handling, you can recreate this Southern staple in your own oven.

Ingredients for Success

• All-Purpose Flour: 2 ½ cups (plus extra for dusting)
• Baking Powder: 1 tablespoon (ensure it is fresh for maximum lift)
• Baking Soda: ¼ teaspoon (reacts with the buttermilk)
• Salt: 1 teaspoon fine sea salt
• Unsalted Butter: ½ cup (1 stick), extremely cold and cubed
• Buttermilk: 1 cup, chilled (full-fat is preferred for richness)
• Melted Butter: 2 tablespoons (for brushing the tops)

Step-by-Step Instructions

1. Preheat and Prep: Preheat your oven to 425°F (218°C). Line a baking sheet with parchment paper or use a seasoned cast-iron skillet for a crispier bottom.
2. Mix Dry Ingredients: In a large mixing bowl, whisk together the flour, baking powder, baking soda, and salt.
3. Cut in the Fat: Add the cold, cubed butter to the flour. Use a pastry cutter or two forks to work the butter into the flour until the mixture resembles coarse crumbs with a few pea-sized pieces of butter remaining. Pro tip: Do not over-mix; those butter chunks create the steam vents that make layers!
4. Hydrate the Dough: Make a well in the center and pour in the cold buttermilk. Stir gently with a wooden spoon or fork just until a shaggy dough forms. Do not overwork it.
5. The Folding Technique (Lamination): Turn the dough onto a lightly floured surface. Gently pat it into a rectangle. Fold the dough in thirds like a letter. Rotate 90 degrees and repeat this process 3 times. This creates the flaky “lamination” seen in professional bakeries.
6. Cut the Biscuits: Pat the dough down to about 1-inch thickness. Use a 2.5-inch biscuit cutter to stamp out rounds. Crucial: Press straight down and pull straight up. Never twist the cutter, as this seals the edges and prevents the biscuits from rising.
7. Bake: Place the biscuits on the pan so they are just touching—this helps them climb upward rather than spreading outward. Bake for 12–15 minutes or until the tops are golden brown.
8. Finish: Immediately brush the hot tops with melted butter.

Fact-Check: The Science of the Rise

Why use buttermilk? Buttermilk is acidic. When it hits the baking soda and baking powder, it creates a chemical reaction that releases carbon dioxide, providing an immediate lift to the dough. Additionally, the acidity breaks down gluten strands, ensuring a tender, never-tough crumb.

Why cold butter? As the biscuits bake, the cold bits of butter melt, creating small pockets of steam. This steam expands, pushing the layers of dough apart to create that iconic flaky texture.