In a large bowl combine 2 cups of brown sugar, a ¼ cup of fresh rosemary, 2 tbsp of black pepper, and a tbsp of kosher salt. Mix the ingredients together with a fork and then set aside.
Line a cookie sheet with foil and lay your bacon slices parallel to one another, careful not to have any slices overlap.
Pour a cup of maple syrup in a small bowl.
Generously brush all of the slices of bacon with syrup. After all of the bacon has been brushed, liberally cover the bacon with your dry ingredients.
Get your smoker rolling, and get the temp up to 225 degrees. Put the pan of bacon in the smoker, and let it cook for one hour.
After an hour remove the pan from the smoker and flip each of the slices of bacon. Sprinkle the remaining dry ingredients on the bacon, and put the pan back in for another hour.
After two hours your bacon should be starting to firm up. It's not going to look like traditional crispy bacon, and that's ok! At this point, some of the bacon may start to brown up. You can remove this bacon from the pan and put it on a cooling rack over paper towels. I dare you not to taste test :)
Once the bacon has cooked for two hours and thirty minutes, remove the pan from the smoker, and place all of the slices on the cooling rack. Once they have cooled they will firm up.