Prepare mashed potatoes and let them cool.
In a bowl, mix the cooled mashed potatoes with shredded cheese, green onions, garlic powder, salt, and pepper.
Form the mixture into small balls, about 1 inch in diameter.
Roll each potato ball in breadcrumbs until evenly coated.
Heat oil in a frying pan over medium heat.
Carefully place the potato balls in the hot oil.
Fry the balls for about 3-4 minutes on each side or until golden brown.
Use a slotted spoon to remove them from the oil and drain on paper towels.
Serve hot with your favorite dipping sauce.
Enjoy your crispy, cheesy potato balls!