Jalapeño Cheeseburgers with Bacon and Grilled Onions

INGREDIENTS

• 1/3 cup light corn syrup
• Assorted additional toppings (such as tomato and grilled onion slices)
• 8 lettuce leaves
• 1/4 teaspoon cayenne pepper
• 6 tablespoons fresh lime juice
• 1 teaspoon instant coffee crystals
• 2 cups coarsely shredded sharp white cheddar cheese
• 1 cup mayonnaise
• 1/4 cup chopped fresh parsley
• 1/2 teaspoon cayenne pepper
• 2 pounds ground beef
• 2 tablespoons Worcestershire sauce
• 8 hamburger buns or 3- to 4-inch square focaccia rolls, split horizontally
• 2 teaspoons (packed) golden brown sugar
• 2 tablespoons ketchup
• 1 tablespoon chopped seeded jalapeño chile
• 1/2 cup chopped fresh cilantro
• Nonstick vegetable oil spray
• 1 teaspoon ground black pepper
• 2 tablespoons minced seeded jalapeño chile
• 4 green onions, finely chopped
• 3 tablespoons butter
• 1 small onion, chopped (about 1 1/4 cups)
• 1 cup sour cream
• 16 bacon slices
• 1 teaspoon salt