The Best Butter Burger - Dinner Bell Creamery

Ingredients

• 12 tablespoons (1 ½ sticks) Dinner Bell Unsalted Butter
• 2 yellow onions, medium diced
• Kosher salt, to taste
• 6 strips bacon
• 1 cup mayonnaise
• ¼ cup ketchup
• ½ teaspoon Worcestershire sauce
• ½ teaspoon white vinegar
• Black pepper, to taste
• 2 pounds ground beef
• 6 hamburger buns
• Cooking spray
• 12 slices American or Swiss cheese
• Shredded iceberg lettuce, for topping
• Sliced tomatoes, for topping
• Sliced dill pickles, for topping
• Sliced bacon, cooked crispy, for topping