In a large pot over medium heat, brown the ground beef until fully cooked, breaking it apart with a spoon as it cooks (about 5-7 minutes).

Drain any excess fat from the beef, then add the chopped onion to the pot. Sauté for another 2-3 minutes until the onion becomes translucent.

Stir in the black beans, kidney beans, corn, and diced tomatoes (including their juices). Mix everything thoroughly.

Pour in the beef broth and add the taco seasoning. Stir until well combined. Season with salt and pepper to taste.

Bring the soup to a gentle boil, then reduce the heat and let it simmer for about 10-15 minutes, allowing the flavors to meld together.

Dish out the soup into bowls and add your favorite toppings—shredded cheese, sour cream, cilantro, and crunchy tortilla chips.

Dive into your bowl of The Best Taco Soup and savor each bite!