Pour in the buttermilk; using a rubber spatula, fold buttermilk into the dough, working in all directions and incorporating crumbs at the bottom of the bowl, until the dough just comes together. The dough will be slightly sticky; do not overmix.

Turn out the dough onto a lightly floured work surface. With floured fingers, gently pat the dough into a round about 1 inch thick, pressing in any loose bits. Do not overwork the dough. Use a floured 2 1/4-inch round biscuit cutter to cut out the biscuits as close together as possible. (Use one cut edge as the edge for the next biscuit.)