Preheat Oven: Set oven to 400°F (200°C).
Prepare Carrots: Place the carrots in a large mixing bowl. Drizzle with honey and melted butter, then toss until evenly coated. Add salt and cinnamon if desired.
Bake: Spread the carrots in a single layer on a baking sheet lined with parchment paper. Bake for 25–30 minutes, tossing halfway through, until tender and lightly caramelized.
Serve: Transfer to a serving dish and garnish with chopped parsley if desired. Serve warm as a sweet, simple side dish.
Tip: For a richer flavor, you can roast them a bit longer to get caramelized edges.
