In a large mixing bowl, combine your mashed potatoes, all-purpose flour, baking powder, salt, and black pepper until a soft dough forms.

Fold in chopped green onions and shredded cheese until evenly distributed throughout the mixture.

Transfer dough to a floured surface, divide into eight equal portions, and shape into patties, about ½ inch thick.

Lightly dust each patty with flour for a crispier texture when frying.

Heat a skillet over medium heat and add enough butter to coat the bottom.

Fry each cake for 4-5 minutes on one side until golden brown, then flip and fry the other side.

Remove the cakes using a slotted spatula and place them on paper towels to drain excess grease.

Serve warm as a snack, breakfast, or side dish.