Preheat the oven to 400 F.
Add the brussels sprouts, oil, salt, garlic powder and black pepper to a bowl and mix well.
Place the brussels sprouts on a baking sheet, cut side down.
Roast for 30 minutes.
Meanwhile, pour the apple cider into a skillet over medium heat. Stir occasionally for about 10 minutes, or until the cider has reduced. Do not over boil the cider! Once it coats a spoon - it’s done!
Add the roasted sprouts to the skillet along with the crumbled bacon.