Prepare hot sauce by combining all ingredients in a saucepan over medium-low heat. Stir until butter is melted, and all is well blended. Set aside.
Prepare burger seasoning by combining kosher salt, ground black pepper, and seasoned salt in a small bowl.
Divide ground chuck into 4 different portions. Roll meat into a ball. Heat grill to a medium-high heat. Place meat portions on the grill. Press meat into the grill, and then liberally season with burger seasoning. Flip meat patty once the bottom has browned, season the top of the burger. Brush buns with butter, and toast on the grill.
To assemble burger place down the bottom bun, the burger, add about 1 to 2 teaspoons of hot sauce to the burger, and then top burger with blue cheese crumbles. Add shredded lettuce and tomatoes if desired.