01 -
Preheat the oven to 200°C (400°F) and lightly grease a muffin tin to prevent sticking.
02 -
In a large bowl, whisk the eggs and sour cream together until smooth for a light, creamy consistency.
03 -
Stir in the shredded cheese, Parmesan cheese, and chopped chives until evenly combined.
04 -
Gently fold the chilled mashed potatoes into the mixture, ensuring thorough but gentle incorporation to maintain texture.
05 -
Spoon the mixture into the muffin tin, filling each cup about three-quarters full to allow for slight rising during baking.
06 -
Place the tin in the oven and bake for 20–25 minutes until the tops are golden brown and slightly puffed.
07 -
Allow the cheese puffs to cool slightly before removing them from the muffin tin and serving.