Preheat the oven to 400°F (200°C).
In a large bowl, season the chicken thighs with salt, black pepper, garlic powder, onion powder, and smoked paprika.
In a separate bowl, mix the melted butter with minced garlic. Pour half of this mixture over the seasoned chicken and toss to coat.
On a large sheet pan, arrange the halved baby potatoes, broccoli florets, and baby carrots. Drizzle with olive oil and sprinkle with salt and pepper. Toss to combine.
Place the chicken thighs on the sheet pan among the vegetables. Drizzle the remaining garlic butter over the chicken and veggies.
Bake in the preheated oven for 25-30 minutes, or until the chicken is cooked through and the vegetables are tender.
Optional: Broil for an additional 2-3 minutes for a crispy finish.
Remove from the oven and let rest for 5 minutes. Garnish with fresh parsley before serving.