Preheat the oven to 400 degrees F. and line a baking sheet with parchment paper or a silicone mat. Set aside.
Wash and dry the Brussels sprouts. Trim the end and cut them in half. You can leave the small one whole.
Place them in a medium bowl and sprinkle the salt and black pepper. Set aside for 5 minutes for the salt to work its way into the Brussels sprouts.
Add the olive oil and toss until evenly coated.
Transfer the Brussels sprouts onto the baking sheet, distribute them evenly, and put all of them close together.
Roast for 20 minutes.
Carefully remove the sheet from the oven and drizzle the maple syrup. Mix well and roast for 5 minutes.
Remove them from the oven, transfer them to a serving dish, and enjoy!
Notes
Make sure the sprouts are dry: After washing, dry them thoroughly; otherwise, excess moisture leads to them steaming, not roasting.
Use REAL maple syrup: There are lots of sub-standard dupes and maple-flavored syrups out there.
Don’t skimp on oil: It’s needed for perfectly crispy Brussels sprouts.
For maximum crispiness: Preheat the oven tray with a little oil, then place the sprouts cut-side down, spaced out, in a single layer on the pan. Avoid overcrowding the tray, don’t toss them during the roasting process, and optionally broil at the end for even more char.