Pulse flour, sugar, baking powder, baking soda and salt in a food processor until combined. Add butter and pulse until evenly combined and in pea-size bits. Add buttermilk and pulse in very short bursts until evenly incorporated. The dough will be soft and a little shaggy looking.Advertisement
Generously dust a work surface with flour. Use a rubber spatula to transfer the dough to the work surface. Sprinkle with more flour. With floured hands, gently pat the dough into a rectangle about 3/4 inch thick, with a long edge facing you. Gently roll out the dough to 1/2 inch thick, using short strokes from the center outward and very little pressure, dusting the dough and surface with more flour as needed. Run an offset spatula under the dough, then gently fold it in thirds, like a letter.
Dust the work surface with more flour and rotate the dough 90 degrees. Dust the dough and roll out again into a 1/2-inch-thick rectangle, then fold it in thirds again. Repeat the process two more times (for four folds total), dusting the work surface and the dough with flour each time before rolling out.
Line a large baking sheet with parchment paper. Place the folded dough on it and refrigerate for 15 minutes.
Brush a clean work surface with oil, place the dough on it and gently roll out to 1/2 inch thick. Cut out biscuits with a floured 2-inch round cutter. Press the scraps back together and reroll, to make about 24 biscuits total. Place the biscuits 1/2 inch apart on the prepared baking sheet. Refrigerate for 15 minutes. (Or cover and refrigerate for up to 2 days.)
Position a rack in the upper third of oven; preheat to 500 degrees F.
Place the pan of biscuits on the upper rack. Immediately reduce the oven temperature to 450 degrees . Bake until rich golden brown, 12 to 14 minutes. Transfer to a wire rack to cool for 5 minutes. Serve warm.
Make Ahead Tip: Prepare through Step 5, cover and refrigerate for up to 2 days.
Equipment: 2-inch round cutter, offset spatula
1/2 starch, 1 fat