01 -
Place a large skillet over medium-high heat and sauté beef until it releases fat, approximately 4-5 minutes. Break it up with a spatula while cooking.
02 -
Add diced onion to the skillet and sauté until tender, about 4-5 minutes. Stir in minced garlic, cumin, chili powder, garlic powder, dried oregano, salt, and pepper, and cook for an additional 30 seconds while stirring constantly.
03 -
Transfer the cooked beef mixture into a 6-quart slow cooker.
04 -
Add rinsed and drained beans, diced tomatoes with their juice, diced tomatoes and green chilis with their juice, and tomato sauce to the slow cooker. Stir to combine.
05 -
Cook the mixture on high for 3-4 hours or on low for 6-8 hours. Adjust seasoning to taste if needed and serve warm.