Divide the enoki mushrooms into 12 bundles. Do not scrimp on the amount of mushrooms as they wilt and shrink once cooked. Wrap a piece of bacon around each bundle and lay them in a shallow baking dish.
In a small saucepan, combine brown sugar, butter, soy sauce, garlic powder and freshly ground black pepper. Allow the mixture to boil over medium heat, stirring once or twice just to ensure that the ingredients are mixed evenly. It is not necessary wait for the sugar to dissolve.
Pour the mixture over the bacon wrapped enoki mushrooms, making sure that each piece has been coated with sauce. Bake until bacon is fully cooked and sauce has been reduced, about 20-25 minutes.