Preheat oven to 375 F. Grease a 10 inch cast iron skillet, or grease and lightly flour a medium baking sheet.

In a large bowl, combine flour, baking soda, and salt, and whisk together. Add buttermilk and combine using a spatula until just mixed. If too dry to combine completely, add more buttermilk one teaspoon at a time until the dough reaches a soft and sticky consistency.

Coat hands with flour and shape dough into a dome-shaped loaf. Place in the skillet or baking sheet.

Using a sharp knife, cut a cross shape 1/2 inch deep across the top of the loaf.

Bake 40-45 minutes or until bread is a golden brown color. Remove from the oven, transfer to a wire rack, and allow to cool completely before slicing.