Preheat: Preheat the oven to 400°F. Line a baking sheet with parchment paper.
Coat: In a large bowl, toss the Brussels sprouts with the breadcrumbs, garlic powder, onion powder, 2 tablespoons of maple syrup, and 1 tablespoon of sriracha (use 1 or 2 teaspoons for less heat).
Roast: Spread the seasoned Brussels sprouts over the prepared baking sheet. Top them off with any extra panko breadcrumbs left at the bottom of the bowl.
Toss: Remove from the oven and use a spoon to toss the Brussels sprouts, exposing more surfaces to heat.
Continue roasting: Return the baking sheet to the oven and roast for an additional 10 minutes, or until the breadcrumbs are golden brown and crispy and the Brussels sprouts are tender. Keep a close eye on them as you approach 10 minutes (around 25 minutes total in the oven) to avoid burning.
Make the glaze: While they roast, combine 1 tablespoon of maple syrup with 1 teaspoon of sriracha in a small bowl. Taste and add an extra ½ teaspoon of sriracha if you prefer more spice.
Serve: Spoon the Brussels sprouts into a serving dish and drizzle them with the spicy maple syrup. Serve hot.