Sheet Pan Burgers
Heat smoker to 300° F.
Peel and thinly slice yellow onion and spread evenly on ½ aluminum sheet tray (12”x17” tray) or similar tray.
Press burger evenly out on top of onions on tray. For a thinner burger use three pounds versus four pounds of burger. Pro Tip: cover pan with parchment paper and press down with another pan to flatten.
Sprinkle top of burger with seasoning.
Place directly on rack in smoker and smoke for 30-45 minutes until an internal temperature of 165° F.
Remove from smoker and carefully tilt pan to remove excess grease.
Cover top of burger with American Cheese and put on smoker until cheese is melted.
Add the tops of burger buns on top of cheese for last 2 minutes.
Remove from smoker and cut in between burger tops with sharp knife or pizza cutter.
Spatula out burgers individually and put on bottom bun, making sure to scoop out onions too.