01 - Preheat oven to 425°F and line a large baking sheet with parchment paper.
02 - Toss carrots with olive oil, honey, thyme, salt, and pepper in a large bowl until evenly coated.
03 - Spread carrots in a single layer on the prepared baking sheet.
04 - Roast for 25 to 30 minutes, turning once halfway through, until tender and caramelized at the edges.
05 - If desired, toss hot carrots with butter just before serving for added richness.
06 - Transfer carrots to a serving platter, garnish with additional fresh thyme, and serve warm.