In a Dutch oven over medium heat, cook the ground beef until browned.
Once the beef is fully cooked, add in the broth, pureed squash, tomato sauce, tomato paste, beans, and cashew butter. Season the chili with cumin, turmeric, curry powder, chili powder, cinnamon, garlic powder, and salt and pepper to taste.
Let the pot simmer for 10-15 minutes.
Spoon the chili into serving bowls and allow to cool slightly. Top with sour cream and cilantro before serving.