Preheat the oven to 425 degrees.
Bake the sweet potatoes until they are soft, about 1 hour, 10 minutes. Remove from the oven and let cool slightly.
In a small bowl, whisk together the orange zest, orange juice, brown sugar, cinnamon, chili powder, and salt. Scoop the sweet potato flesh into a large bowl. Pour in the orange juice mixture and mash well.