Preheat oven to 425°F. In medium bowl, add the sweet potatoes, olive oil, chili powder, cumin, paprika, garlic powder, salt and black pepper and mix until well coated.
Line a baking sheet with parchment paper and add the sweet potatoes, spreading out in an even layer. Bake for 20 minutes, tossing halfway through.
Remove from oven and add the lime juice and cilantro.