Easiest. Recipe. Ever. Tasty as well.
4 pounds corned beef brisket
1 cup brown sugar
1 (12 fluid ounce) can or bottle Irish stout beer (e.g. Guinness®)
Preheat oven to 300 degrees F (150 degrees C). Rinse the beef completely and pat dry. Place the brisket on rack in a roasting pan or Dutch oven. Rub the brown sugar on the corned beef to coat entire beef, including the bottom. Pour the beer in the Dutch oven, then gently set the beef in. Cover, and place in preheated oven. Bake for 3 1/2 hours. Allow to rest 5 minutes before slicing.