Preheat the oven to 425°F. Line a baking sheet with parchment paper or foil for easier clean up.
In a large bowl, mix together ¼ cup melted salted butter, ⅓ cup brown sugar, 1 teaspoon cinnamon and ½ teaspoon salt.
Pat 1½ baby carrots dry with a paper towel (otherwise seasonings won’t stick as well), then add them to the bowl and toss everything together until evenly coated.
Place in the oven to roast for 20-25 minutes, flipping halfway through. Check that carrots are done by poking with a fork – they should be soft. Now the carrots are ready to serve. Scoop the carrots onto a plate and enjoy.