1. Preheat Your Oven and Prepare the Baking Sheet: Start by preheating your oven to 400 F (200 C). Line a large baking sheet with parchment paper or aluminum foil for easy cleanup. This step is crucial for preventing sticking and ensuring even roasting.

2. Clean and Trim the Brussels Sprouts: Wash the Brussels sprouts thoroughly under cold running water. Trim off the tough ends of each sprout and remove any loose or discolored outer leaves. For larger sprouts, cut them in half lengthwise. If they are very large, you can quarter them to ensure they cook evenly and get nice and crispy.

3. Combine Ingredients in a Large Bowl: Place the trimmed and halved Brussels sprouts into a large mixing bowl. Drizzle the olive oil over the sprouts, followed by the pure maple syrup. Sprinkle with salt and black pepper.

4. Toss to Coat Evenly: Using your hands or a large spoon, toss the Brussels sprouts until they are thoroughly coated with the oil, maple syrup, salt, and pepper. Make sure every sprout gets a good coating for maximum flavor and caramelization.

5. Arrange on the Baking Sheet: Spread the coated Brussels sprouts in a single layer on the prepared baking sheet. Avoid overcrowding the pan, as this can steam the sprouts instead of roasting them, leading to a less crispy texture. If necessary, use two baking sheets.

6. Roast Until Tender and Caramelized: Transfer the baking sheet to the preheated oven and roast for 20-25 minutes. Halfway through the cooking time (around 10-12 minutes), give the sprouts a good stir or flip them with a spatula to ensure even browning and crispiness on all sides.

7. Check for Doneness: The Brussels sprouts are ready when they are tender when pierced with a fork, and their outer leaves are nicely browned and slightly crispy. The maple syrup will have caramelized, giving them a beautiful glossy finish.

8. Serve Immediately: Once roasted to perfection, remove the baking sheet from the oven and serve the maple roasted Brussels sprouts hot. They are best enjoyed fresh from the oven.