Cook the Bacon – Fry bacon until crispy, chop, and set aside for the Baconnaise sauce.
Form the Patties – Shape thin patties, place cheese in the center, and seal with a second patty. Season both sides.
Toast the Buns – Spread mayo on the cut side of buns and toast until golden.
Cook the Burgers – Grill or pan-cook patties low and slow until cheese melts and burgers reach 160°F internally.
Make Baconnaise Sauce – Mix mayo, ketchup, mustard, Worcestershire, apple cider vinegar, seasoning, red pepper flakes, and chopped bacon until creamy.
Assemble the Burgers – Spread Baconnaise sauce on bottom bun, add tomato slice, stuffed patty, BBQ sauce, onion rings, and jalapeños. Top with more sauce and the toasted bun.