Brown beef along with onion in a large pot, drain fat. Add pinto beans, kidney beans, corn, diced tomatoes with green chilis, tomato sauce, and taco seasoning.
Simmer 20 minutes.
Serve hot with desired toppings.
Pressure Cooker
Set your pressure cooker to saute and brown ground beef and onion.
Add pinto beans, kidney beans, corn, diced tomatoes with green chilis, tomato sauce, and taco seasoning.
Set to soup setting for 15 minutes. Use a quick release to release the pressure.
Serve hot with desired toppings.
Notes
For Slow Cooker: Brown beef and onions in a frying pan, transfer to a slow cooker. Add remaining ingredients and cook on high for 4 hours, or low for 6-8 hours.