Double the smash, double the cheese. 🍔🍔 Celebrate National Double Cheeseburger Day with this viral onion bun burger—made easy with Omaha Steaks pre-smashed burgers. Ready in 5 minutes, it’s low-carb, keto-friendly, and packed with protein! Double Smash Burger With Onion Bun Ingredients: 4 Omaha Steaks Smash Burgers 4 slices of American cheese 1 sweet onion, sliced into four ½ inch thick slices 1 Tablespoon special sauce Special Sauce Ingredients: ½ cup mayo 3 Tablespoons ketchup 2 Tablespoons sweet relish ½ teaspoon white vinegar 2 teaspoons sugar Salt and pepper to taste Special Sauce Directions: 1. Mix all ingredients together. Store in an airtight container. Smash Burger Direction: 1. Preheat your grill to medium-high heat. 2. Place the onion slices and the burgers on the grill. 3. After 3 minutes, flip the burgers. 4. Let it cook for 2 more minutes, then top with cheese. 5. Cook the onions until soft and charred, then flip the onions and repeat. 6. Use the...