The primary ingredient in a traditional taco is usually a protein filling. This can vary widely—from seasoned ground beef or shredded chicken to grilled fish or pork carnitas. Tacos are versatile, allowing for a broad range of fillings, but the common practice involves using seasoned meat as the base. Fresh toppings such as onion, cilantro, salsa, and guacamole typically accompany the protein, all wrapped in a corn or flour tortilla, making tacos a beloved staple in Mexican cuisine.