01 - Place peeled and quartered potatoes in salted water. Bring to a boil and cook until fork-tender, approximately 12-15 minutes. Drain thoroughly and return to hot pot for 1-2 minutes to steam dry.
02 - Mash potatoes until completely smooth and lump-free. Allow to cool for a few minutes until warm but not hot.
03 - Add softened butter, flour, baking powder, and ground white pepper to mashed potatoes. Mix until soft dough forms that holds together without sticking excessively.
04 - Turn dough onto lightly floured surface. Gently knead just until combined. Shape into flat round approximately 1/2 inch thick. Cut round into four equal quarters.
05 - Heat heavy skillet or griddle over medium heat. Add small amount of butter or oil. Cook farls 3-5 minutes per side until golden brown with slightly crispy exterior.
06 - Serve warm with butter or as part of traditional Irish breakfast with eggs, bacon, or smoked salmon.