Preheat your oven to 400°F. Lightly grease a large baking dish or line it with parchment paper.
Place the baby carrots in the prepared dish. Sprinkle evenly with salt, ginger, nutmeg, black pepper, and brown sugar. Toss gently to coat the carrots.
Drizzle the maple syrup over the carrots and stir to ensure they are evenly coated. Scatter the cubed butter on top.
Roast in the preheated oven for 25–30 minutes, stirring halfway through, until the carrots are tender and lightly caramelized.
For a thicker glaze, remove the carrots from the oven and transfer the pan liquid to a small saucepan. Simmer over medium heat for 3–5 minutes, whisking occasionally, until the glaze is syrupy. Pour the glaze back over the roasted carrots before serving.