| 2½ pounds | Yukon Gold potatoes, peeled and cut into 1-inch chunks |
| 1½ cups | half & half |
| 3 ounces | unsalted butter |
| 3 ounces | white truffle butter, room temperature |
| 2 tablespoons | grated Parmesan cheese |
| 2½ teaspoons | kosher salt |
| 1 teaspoon | ground black pepper |