Preheat oven to 400 degrees Fahrenheit (204 degrees Celsius).
Line a large baking sheet with parchment paper or aluminum foil.
In a large mixing bowl, whisk together the melted butter, brown sugar, cinnamon, and salt.
Add the prepared carrots to the bowl and toss until thoroughly coated with the glaze.
Spread the carrots in a single layer on the prepared baking sheet.
Bake for 25 to 30 minutes, tossing halfway through, until carrots are fork-tender and the glaze is bubbling.