Step 1

Preheat your oven to 375°F (190°C). Grease a 12-cup muffin tin with nonstick spray or butter.

Step 2

In a large bowl, combine the mashed potatoes, shredded cheddar cheese, Parmesan cheese, sour cream, eggs, garlic powder, salt, and pepper. Mix until well combined.

Step 3

Spoon the mashed potato mixture into the prepared muffin cups, filling each about 3/4 of the way full. Sprinkle more shredded cheddar cheese on top for an extra cheesy crust.

Step 4

Bake in the preheated oven for 20-25 minutes, or until the tops are golden brown and the muffins are set.

Step 5

Allow the muffins to cool for a few minutes in the tin. Garnish with freshly chopped chives or parsley, if desired, and serve warm.