2 lbs. russet potatoes, peeled and cut into quarters
2 tsp. kosher salt
1/4 cup buttermilk
2 Tbsp half-and-half
4 Tbsp butter
1/4 cup chives, chopped
freshly ground black pepper
Put the potatoes in a large pot. Add the 2 salt and enough water to cover the potatoes. Bring to a boil over medium-high heat, reduce the heat to medium-low and simmer until the potatoes are tender when pierced, 15 to 20 minutes. Turn off heat, drain well in a colander, and return to hot pan to evaporate some more moisture.
In a small saucepan over medium heat, combine the buttermilk, half-and-half, and butter. Heat until just warm and set aside.
Using a potato masher, ricer, or the lowest speed on your stand mixer to mash the potatoes well. Slowly add in the buttermilk mixture, continuing to mash and combine until the potatoes are smooth and creamy. Stir in the chives and season with salt and pepper. Transfer the potatoes to serving bowl and serve immediately.
This serves 4, but can easily be doubled or tripled to accommodate a larger crowd.