01 - Place the potatoes in a saucepan, cover with cold water, and add a pinch of salt. Bring to a boil and simmer for 12–15 minutes or until fork-tender. Drain well and return to the pan to steam dry for 1 minute.
02 - Mash the potatoes until smooth. Stir in the butter and milk until fully incorporated and creamy. Let cool for 5 minutes.
03 - Add the sliced scallions, flour, salt, and pepper to the mashed potatoes. Mix thoroughly to form a soft dough.
04 - Turn the dough onto a lightly floured surface. Gently knead and pat into a ¾ inch thick round. Cut into 8 wedges or use a round cutter for circles.
05 - Heat a large nonstick skillet or griddle over medium heat and melt a little butter. Fry the potato cakes in batches for 3–4 minutes per side, or until golden and crisp.
06 - Serve warm, garnished with extra scallions or a dollop of sour cream if desired.