01 - Preheat oven to 400°F. Lightly grease a baking sheet or line with parchment paper.
02 - If using fresh potatoes, peel and boil until tender. Mash with butter, milk, salt, and pepper until smooth. Allow to cool slightly before mixing.
03 - In a large bowl, combine mashed potatoes, cheddar cheese, Parmesan cheese, eggs, chives, smoked paprika, and flour. Mix until thoroughly incorporated and smooth.
04 - Using a spoon or small ice cream scoop, form 12 equal dollops of the mixture onto the prepared baking sheet, spacing evenly.
05 - Brush the tops of each puff with melted butter for enhanced golden color and flavor.
06 - Bake for 25 to 30 minutes until puffs are golden brown and set throughout.
07 - Let cool for a few minutes on the baking sheet. Serve warm, optionally topped with sour cream.