Preheat oven to 400 degrees (F).
In a small bowl, place cranberries and maple syrup. Stir to coat and set aside.
On a large baking sheet, mix together the Brussels sprouts, olive oil, kosher salt, and black pepper.
Spread out the Brussels sprouts evenly on a large baking sheet. Cut side halves should be facing down.
Bake for 25-30 minutes or until crisp on the outside and tender on the inside.
Remove from oven. Place in bowl and toss with maple infused cranberries.