In a medium bowl, combine the ground turkey, garlic powder, sea salt, black pepper, and 1 tablespoon of the buffalo sauce.
Gently mix the ingredients until just combined, being careful not to overwork the meat, then form into one large, thick patty.
Heat the avocado oil in a cast-iron skillet over medium-high heat until the oil is shimmering.
Place the patty in the hot skillet and sear for 5 to 6 minutes on one side without moving it, allowing a deep, crispy golden-brown crust to form.
Carefully flip the burger and cook for another 4 to 5 minutes, or until the internal temperature reaches 165 degrees Fahrenheit.
During the last minute of cooking, sprinkle the blue cheese crumbles over the top of the patty and cover the pan briefly with a lid to melt the cheese.
While the burger rests for a moment, slice the celery stalk into thin matchsticks to provide a fresh, cooling texture.
Stack the crispy patty into the butter lettuce leaves, drizzle with the remaining tablespoon of buffalo sauce, and top with the sliced celery before serving.