Preheat smoker to 300°F - 350°F. This is a higher temperature for a smoker, but you may have to adjust vents or throw an extra wood block in there.
Mince half of a small onion. Lightly saute the minced onion for about 5 minutes over medium heat. I like to lightly saute the onion before I incorporate it into the ground beef. You can add it raw as well.
Combine in a mixing bowl the beef, onions, salt, pepper, and garlic powder. Use your hands to incorporate it well.
Once the mixture is well combined shape it into two large patties. Creating a large patty helps to allow more time for the smoke to permeate the meat without overcooking the burger.
Place the burgers on the smoker and smoke at 300°F - 350°F for about 30 minutes. Check the internal temperature of the burger for your desired doneness. I cooked my burger to 140°F internal temperature
Once the burgers are done top them with your favorite burger toppings and enjoy.
Notes
Nutrition: The nutrition facts are for one 8-oz burger without a bun or toppings. You can make smaller 4-oz burgers if you prefer.