Chile powder, cumin, and ginger combined with a touch of maple syrup create a spicy-sweet flavor addition to a traditional Thanksgiving player.
Preheat the oven to 350 degrees.
Pierce each sweet potato in several places with a fork. Place directly on the oven rack and roast until soft, 45-60 minutes. Transfer to a cutting board and let stand until cool enough to handle, about 10 minutes.
Slip off the skins and cut the sweet potatoes into 1-inch slices. Transfer to a large bowl and add the butter. Smash the sweet potatoes with a potato masher or fork until fluffy but some lumps remain. Add the remaining ingredients and stir to combine.