Put the Wagu patties between two pieces of parchment and smash them with a burger smasher to form thin patties.
Place some American cheese and bacon bits on one patty, then cover it with another patty.
Use the parchment paper to seal the edges of the burger, ensuring they are tightly packed.
Place the burgers in the fridge for 5 to 15 minutes to let the shape tighten up.
Set your Ninja Woodfire Grill to medium and use wood pellets for flavor.
Put the burgers on the grill and cook them, flipping once, until they reach an internal temperature of 135-140°F.
Toast your buns with a little butter while the burgers are grilling, so they're ready to hold all the juices.
Once the burgers are done, place them on the toasted buns and serve immediately.