01 - Preheat oven to 425°F. Line a baking sheet with parchment paper or dust lightly with flour.
02 - In a large mixing bowl, whisk together the flour, baking soda, and salt until thoroughly blended.
03 - Create a well in the center of the flour mixture. Pour in the buttermilk and stir gently with a wooden spoon just until a shaggy, sticky dough forms.
04 - Turn the dough onto a lightly floured surface. Gently knead briefly just until it holds together, avoiding overworking. Shape into a round, slightly flattened loaf approximately 2 inches thick.
05 - Place the loaf on the prepared baking sheet. Use a sharp knife to cut a deep X across the top, about halfway through the dough.
06 - Bake for 30 to 35 minutes until the crust is deeply golden and the bottom sounds hollow when tapped.
07 - Transfer the bread to a wire rack and let cool for at least 30 minutes before slicing to allow the crumb to set properly.