Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper.
Arrange cabbage wedges on the baking sheet.
In a bowl, mix miso paste, melted vegan butter, soy sauce, maple syrup, garlic powder, and black pepper.
Brush the miso butter mixture generously over each cabbage wedge.
Roast for 25-30 minutes, flipping halfway through, until the edges are caramelized and crispy.
Garnish with sesame seeds and chives before serving.
