Preheat the oven to 400 degrees F. Line a baking sheet with parchment paper. Place the carrots on the baking sheet.
In a small saucepan, melt the butter over medium heat. When the butter has melted, remove the pan from the heat. Add the brown sugar and honey, and stir to combine.
Pour the butter mixture over the carrots. Sprinkle with the mint, salt and pepper. Toss to combine. Roast the carrots until tender and lightly golden, 20 to 25 minutes. Transfer to a platter and garnish with fresh mint.