For the roasted garlic
01 -
1 large head garlic
02 -
1 teaspoon olive oil
03 -
Pinch of kosher salt
04 -
Pinch of black pepper
For the potatoes
05 -
2 lb (900 g) Russet potatoes, peeled and cut into 2-inch chunks
06 -
1 lb (450 g) Yukon Gold potatoes, peeled and cut into 2-inch chunks
07 -
1 tablespoon kosher salt, for the cooking water
08 -
6 tablespoons (85 g) unsalted butter
09 -
3/4 cup (180 ml) whole milk
10 -
1/2 cup (120 ml) heavy cream
11 -
1/3 cup (80 g) sour cream
12 -
3/4 cup (75 g) finely grated Parmesan cheese, plus more for serving
13 -
1 teaspoon kosher salt, plus more to taste
14 -
1/2 teaspoon black pepper
15 -
2 tablespoons chopped fresh chives
16 -
2 tablespoons melted butter, for serving, optional