4 tablespoons unsalted butter, cut into 4 pieces
2 tablespoons heavy cream
1/2 teaspoon salt
1 teaspoon sugar
2 pounds sweet potatoes, peeled, quartered lengthwise, and cut crosswise into 1/4-inch thick slices
Pinch ground black pepper

Combine butter, cream, salt, sugar and sweet potatoes in 3- to 4-quart saucepan; cook, covered, over low heat, stirring occasionally, until potatoes fall apart when poked with fork, 35 to 45 minutes.

Off heat, mash sweet potatoes in saucepan with potato masher. Stir in pepper; serve immediately.

From Cook's Illustrated
 [kristin buxton]   [food]