Start by rinsing your russet potatoes thoroughly. Peel them carefully, then cut them into evenly sized chunks to ensure uniform cooking.
Place the potato chunks in a large pot and cover with cold water. Add a pinch of salt. Bring to a boil over high heat, then reduce to a simmer and cook until fork-tender, about 15-20 minutes.
Drain the potatoes in a colander and let them steam dry for a few minutes. Optionally, return them to the hot pot on low heat, shaking gently to evaporate excess moisture.
While potatoes dry, gently warm the heavy cream and butter together in a small saucepan or microwave until the butter is melted and mixture is heated through.
Using a potato masher, ricer, or hand mixer, mash the potatoes to a smooth but slightly textured consistency.
Slowly pour in the warm cream and butter mixture, stirring gently to combine. Add salt and black pepper to taste, adjusting seasoning as needed.
Fold in the chopped fresh chives, adding a fresh onion flavor and vibrant color.
Serve the creamy mashed potatoes with chives immediately while warm, as a comforting side dish to your favorite main courses.