Preheat smoker to 225°F. Place the brats in the grill and smoke for 1 ½ hours to 2 hours or until the internal temperature reaches 160°F.
While smoking the brats, make the beer braised onions. Heat medium skillet with unsalted butter over medium heat. Add onions, sugar and salt, cooking for 10 minutes or until they are starting to brown.
Add the beer and cook for another 20 minutes or until the beer is completely absorbed.
Serve the brats in the buns with the onions and your favorite toppings.
Notes
Use a strong wood like hickory, mesquite or oak to smoke the hot dogs.
Avoid piercing the casings while smoking the brats to prevent the juices from escaping, which can result in dry sausages.
If you're pressed for time, smoking the brats at 350°F for approximately 15-20 minutes is an option, but keep in mind that the sausages will have a milder smoky flavor.
Leftover brats can be cut up and put in mac and cheese or another casserole-type dish.