1. In a large mixing bowl, combine the mashed potatoes, cheddar cheese, Parmesan cheese, green onions, and beaten egg. Mix until well combined.
2. Add the flour, garlic powder, black pepper, and salt to the mixture. Stir until you have a thick, cohesive dough.
3. Shape the mixture into small balls, about the size of a golf ball. Roll each ball in breadcrumbs to coat evenly.
4. Heat the vegetable oil in a large skillet over medium heat. Once hot, add the potato balls in batches, ensuring not to overcrowd the pan.
5. Fry the puffs for 2-3 minutes on each side, or until golden brown and crispy. Use a slotted spoon to transfer them to a paper-towel-lined plate to drain excess oil.
6. Serve warm, garnished with extra green onions if desired.

Cooking these puffs together as a family can be a wonderful way to connect, just as I often did with my kids. It’s a hands-on experience that’s sure to bring laughter and joy to your kitchen.