Begin by preheating your oven to 400°F (200°C).

Peel and slice the carrots into uniform pieces, roughly 1 inch long.

In a large pot, bring water to a boil and add the sliced carrots. Allow them to par-boil for about 5 minutes.

In a shallow bowl, combine melted unsalted butter, olive oil, and brown sugar. Stir this mixture until smooth and well combined.

Add the par-boiled carrots to the bowl with your glaze. Gently toss the carrots in the buttery brown sugar mixture until they are completely coated.

Transfer the coated carrots into a baking dish, arrange in a single layer, and bake for 10 minutes. Toss and return to the oven for another 5 minutes, or until tender.

Once baked, remove the carrots from the oven and allow them to cool slightly. Garnish with freshly chopped parsley if desired.