In a mixing bowl, combine creamy mashed potatoes, all-purpose flour, baking powder, and salt. Blend until well incorporated, forming a rustic dough.

Add softened unsalted butter into the potato mixture and knead until the dough is smooth and slightly sticky.

Lightly flour your work surface, transfer the dough, and roll out to about ½ inch thickness.

Cut the rolled dough into rounds or triangles about 3-4 inches in diameter.

Heat a non-stick skillet over medium heat with a small pat of butter. Fry the farls for about 5 minutes on each side until golden brown.

Remove from the skillet and place on a paper towel-lined platter to absorb excess butter. Serve warm.