INGREDIENTS
4 lb
Yukon Gold potatoes, peeled, cut into 2" pieces
6
large garlic cloves, peeled
1 tbsp
plus 2 teaspoons kosher salt, divided, plus more
1 1/4 cups
whole milk
4
thyme sprigs
3/4 cup
plus 2 tablespoons unsalted butter, divided
3/4 tsp
freshly ground black pepper, plus more
1/2 cup
sour cream
1
potato ricer or food mill