Preheat oven to 425°F and line a baking sheet with foil. Set aside.
Add melted butter to a large bowl, then add garlic, thyme, salt, and pepper and stir to combine.
Add carrots and toss to coat. Add parmesan and toss once more.
Spread carrots out on prepared baking sheet. Bake until tender, about 25 minutes, stirring once halfway through.
Adjust seasoning as needed and sprinkle with parsley. Serve and enjoy!