In a large bowl, combine the ground beef, salt, black pepper, garlic powder, and onion powder. Mix gently until just combined. Form into 8 equal patties, making a small indent in the center of each patty with your thumb.

In a saucepan, mix together ketchup, apple cider vinegar, brown sugar, Worcestershire sauce, smoked paprika, garlic powder, onion powder, salt, and pepper. Bring to a simmer over medium heat, stirring occasionally.

Reduce heat to low and let the sauce simmer for about 15 minutes, until thickened. Adjust seasoning to taste. Remove from heat and let cool.

Set your Green Mountain Grill to 450°F. Allow it to preheat fully for even cooking.

Place the patties on the grill and close the lid. Cook for 4-5 minutes per side, until they reach your desired level of doneness. Avoid pressing down on the patties to keep them juicy.

Add a slice of cheddar cheese to each patty during the last minute of grilling. Close the lid to melt the cheese.

Slice the store-bought buns in half and toast them lightly on the grill if desired.

Spread a layer of homemade BBQ sauce on the bottom bun. Add lettuce, a grilled patty with melted cheese, tomato slices, red onion slices, and pickles. Top with ketchup, mustard, and mayonnaise as desired. Place the top bun over everything.