In large soup pot, cook the ground turkey on stove top until browned and cooked through, about 7-8 minutes.
Add 2 tablespoon butter to the pot and add the onions. Cook, stirring frequently ,until translucent, about 5 minutes.
Add the garlic and cook one more minute.
Add the beans, chicken broth, chilies, cumin, basil, cayenne pepper, red chili flakes, and chili powder. Bring to a boil, reduce heat to medium-low and simmer for 20-30 minutes.
After simmering, remove 1 cup of the broth and transfer to a medium bowl. Add the sour cream to the broth and stir together with a whisk or a fork until well combined. This step will ensure the sour cream doesn't curdle/separate once added to the chili.
Add the broth/sour cream mixture back to the soup pot and stir to combine.
Stir in the shredded cheese and cook until melted.
Serve topped with more sour cream, green onions, and Fritos!
Enjoy!