01 - Preheat oven to 425°F (220°C) and line a large sheet pan with parchment paper or foil.
02 - Arrange prepared carrots in a single layer on the sheet pan.
03 - In a medium bowl, whisk together cream soda, melted butter, brown sugar, salt, pepper, cinnamon, and vanilla extract until well combined.
04 - Pour glaze evenly over the carrots and toss to coat thoroughly.
05 - Roast for 25–30 minutes, stirring halfway through, until carrots are tender and caramelized, with some golden edges.
06 - Remove from oven, transfer to a serving platter, and sprinkle with fresh parsley and flaky sea salt if desired. Serve warm.