01 - Grate both the starchy and waxy potatoes using a box grater. Place the grated potatoes in a clean kitchen towel and squeeze out as much moisture as possible.
02 - Transfer the squeezed potatoes to a large mixing bowl. Add the flour, baking powder, salt, and pepper. Mix until evenly distributed throughout the potatoes.
03 - Pour in the melted butter and buttermilk, stirring thoroughly to create a thick, cohesive batter.
04 - Place a large non-stick skillet over medium heat and add a small amount of butter or oil to coat the surface.
05 - Drop approximately 1/4 cup of batter for each pancake into the skillet, gently flattening to form even rounds. Cook for 3 to 4 minutes per side until golden brown and crispy. Transfer to paper towel-lined plates and repeat with remaining batter.
06 - Serve warm with a generous dollop of sour cream and a sprinkling of fresh chives.