Preheat your oven to 425°F (220°C). Line a large baking sheet with parchment paper or a silicone mat for easy cleanup.
Pat the chicken thighs dry with paper towels. This helps them get nicely browned. Place them on the sheet pan, skin-side up.
Toss the cubed sweet potatoes with olive oil, rosemary, paprika, garlic powder, salt, and pepper. Spread them around the chicken on the pan.
If you’re using extra root vegetables, cut them to a similar size as the potatoes and add them to the sheet pan.
Roast in the hot oven for about 25–30 minutes, then flip the chicken and stir the vegetables so they cook evenly.
Continue roasting for another 10–15 minutes, or until the chicken reaches an internal temperature of 165°F (74°C) and the potatoes are tender and lightly caramelized.
If you’d like, finish with a quick squeeze of lemon juice and a small dab of butter or a drizzle of olive oil for extra shine.
Remove from the oven and let rest for 5 minutes before serving. This helps the juices redistribute and keeps the chicken juicy.