In a mixing bowl, combine the mashed potatoes, shredded cheese, beaten egg, green onions, garlic powder, salt, and black pepper. Mix until well combined.

Using a piping bag or your hands, shape the potato mixture into small balls or puffs and place them on a baking sheet.

Roll each puff in bread crumbs until fully coated.

Heat oil in a frying pan over medium heat. Fry the puffs in batches until golden brown and crispy, about 3-4 minutes per side.

Remove from oil and drain on paper towels. Serve warm with your favorite dipping sauce.