Preheat your oven to 350°F (175°C) and grease a muffin tin (or use those adorable cupcake liners).
In a large bowl, combine your already mashed potatoes, shredded cheddar cheese, milk, eggs, green onions, salt, and pepper.
Mix everything until it’s well combined but be careful not to overmix. You want that lovely fluffy texture!
Spoon the mixture into the muffin tin, filling each cup around ¾ full. Trust me, they’ll puff up beautifully!
Bake in the preheated oven for about 20-25 minutes or until the muffins are nicely golden brown on top.
Let them cool slightly before removing them from the pan. Enjoy fresh or store in an airtight container for a later treat!
