2 pounds sweet potatoes, peeled and cut into 1-inch chunks
2 to 4 tablespoons unsalted butter  (add in as much as you like)
1/4 cup freshly squeezed orange juice
Salt and freshly ground black pepper

Place the potatoes in a medium pot and cover with cold water.  Place the pot over medium-high heat and bring the liquid up to a bubble.  Boil the potatoes until tender, 10 to 12 minutes.  Drain.

Transfer the potatoes to a large mixing bowl (or the pot that they were cooked in) and add the butter, orange juice, and some salt and pepper.  Mash to the consistency you like or, for a silky smooth texture, transfer them to the bowl of a food processor and pulse until smooth.  Transfer to a serving dish and serve immediately.