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Big Mac sauce is the iconic, tangy, and creamy secret sauce that defines the flavor of McDonald's signature Big Mac burger. While the exact recipe is a closely guarded trade secret, it is widely understood to be a mayonnaise-based sauce featuring a blend of sweet pickle relish, yellow mustard, vinegar, garlic powder, onion powder, and paprika. It was created by McDonald's franchisee Jim Delligatti in 1967 and has become a cultural staple in fast-food cuisine.
As a condiment, Big Mac sauce is primarily a source of fat and sodium, with a small amount of sugar from the relish and ketchup components. A single serving (about 1 ounce or 28 grams) contains roughly 110 calories, most of which come from fat.
The sauce's cultural impact is so significant that it has spawned countless copycat recipes and even its own limited-edition bottles sold by McDonald's. Nutritionally, it exemplifies how fast-food flavor profiles are engineered to hit a 'bliss point' of salt, sugar, and fat, making it highly palatable and memorable.