Taco Soup

1.5 lb ground beef
1 cup chopped red onion
1 x 1.25 oz taco seasoning mix
1 x 1 oz ranch dressing mix
2 x 15.25 oz cans whole kernel corn, undrained
1 x 16 oz can pinto beans, undrained
1 x 15 oz can black beans, undrained
2 x 10 oz can diced tomatoes w/ chiles
1 x 12 oz bottle beer

cook beef and onion in skillet until beef is browned. Drain.
combine meat and remaining ingredients in crock pot.
cover and cook on low 5 hours.

serve topped with shredded cheddar cheese