Preheat your oven to 400°F (200°C) and lightly grease a muffin tin.
In a large bowl, combine the mashed potatoes, cheddar cheese, Parmesan, eggs, milk, green onions, garlic powder, smoked paprika, salt, and pepper. Mix well until smooth and creamy.
Spoon the potato mixture into the prepared muffin tin, filling each cup about three-quarters full.
Bake for 20-25 minutes, until the tops are golden and the puffs are set.
Let cool slightly before removing from the muffin tin. Serve warm and enjoy the cheesy, fluffy goodness!
