Preheat oven to 400˚F.
Line a rimmed baking sheet with foil.
Transfer prepared carrots to baking sheet and spread out in one single layer. Set aside.
In a small bowl whisk to combine maple syrup and brown sugar.
Dot butter pieces over the carrots in several different places.
Pour the maple mixture over the carrots.
Season with salt and pepper; toss around to combine.
Bake for 30 to 40 minutes, tossing at least once during cooking, until tender. To test for doneness, start checking at the 25 minute mark by piercing the thickest part of the carrot with a fork. If it goes through easily, the carrots are done.
Remove from oven.
Taste for seasonings, mostly salt, and adjust accordingly.
Garnish with fresh herbs and serve.