In a large bowl, combine the flour, baking soda, and salt.
Make a well in the center and add 3/4 cup (180 milliliters) of the buttermilk. Gently mix into the flour to form a dough. If too crumbly, slowly add the remaining 1/4 cup (60 milliliters) buttermilk.
On a lightly floured surface, pat the dough into a circle about 1/2 inch (1.25 centimeters) thick.
Use a sharp knife to cut the circle into 4 equal quadrants (farls).
Place a large skillet over medium low heat.
Once heated, dust lightly with flour.
Add the cut farlsĀ to the skillet, making sure they don't touch. If the pan is too small, cook them in 2 batches.
Cook until the bottom is browned, about 4-6 minutes, then gently flip and cook until browned and heated through on the other side. Adjust the heat between medium low and low as needed. Test the center of the bread with a toothpick or skewer through the thickest part. It should be clean.
Serve the Soda Farls warm from the skillet with butter and jam or as a part of an Ulster Fry.