Drop the whole potatoes into salted boiling water and cook until a knife slides through easily, about 25 minutes. They should yield to gentle pressure but not be falling apart — you want them cooked through but still holding their shape.
⏱ 25 min
Drain the cooked potatoes thoroughly and mash them while they're still hot — the steam helps create a smoother texture. Work out any lumps with your masher or ricer, but don't overthink it. Slightly rustic is fine here.
Working quickly with the raw grated potatoes, wrap them tightly in a clean kitchen towel and twist the ends to form a pouch. Squeeze hard over the sink — you want to extract as much moisture as possible. This step makes the difference between soggy and crispy.
In a large mixing bowl, combine the mashed potatoes, squeezed grated potatoes, flour, salt, and pepper. Use your hands or a wooden spoon to bring everything together — the mixture will look shaggy at first, but that's normal.
Pour in the buttermilk slowly, stirring as you go until you have a thick batter that holds together but isn't too stiff. Think somewhere between pancake batter and cookie dough — it should drop from a spoon but not be pourable.
Melt 1 tablespoon of butter in a large skillet or griddle over medium heat. The butter should bubble gently but not brown — adjust your heat if it starts sizzling aggressively.
Scoop 1/4 cup portions of batter into the hot pan, leaving space between each pancake. Use the back of your spoon to gently flatten them into rough circles about 4 inches across — they don't need to be perfect.
Let them cook undisturbed until the bottoms are deep golden brown and the edges look set, about 4 minutes. Flip carefully and cook the other side until equally golden. You'll hear them sizzle steadily — that's the sound of crispy edges developing.
⏱ 8 min
Transfer the finished boxty to a warm plate and repeat with the remaining batter, adding fresh butter to the pan as needed. Serve them hot — they're at their best when that exterior is still crackling from the skillet.