Prepare the Mac & Cheese according to recipe (or the directions on the box).
In a large bowl, mix the ground beef and marinade. With your hands, make 6 large hamburger patties.
Prepare the grill for direct cooking. Over medium heat, cook the burger until done, about 10-12 minutes, flipping once during cooking. Add the cheese during the last minute of cooking to melt.
Assemble the burgers from the bottom up: bottom bun, pickles, onion, cheese burger, ¼ cup of mac & cheese. Drizzle 1 tablespoon Sweet Heat over the mac & cheese and then top with the bun.