Preheat oven to 425 degrees F. Line a large baking sheet with parchment paper.
Trim bottom of brussels sprouts, cut in half from top to bottom and remove loose leaves.
Add cut brussels sprouts to a large bowl with 3 tablespoons olive oil, ¾ teaspoon kosher salt and ½ teaspoon black pepper. Toss to evenly coat.
Transfer brussels sprouts to parchment-lined baking sheet. Arrange so they are cut-side down to maximize caramelization.
Place on the middle rack of preheated oven and roast for 22 to 25 minutes, until caramelized and crisp.
Put brussels sprouts back in the bowl and drizzle with 3 tablespoons hot honey. Toss to coat.
Transfer to a serving dish. Drizzle on extra hot honey and a few pinches of red pepper flakes (optional). Serve.