- Chop onion and heat a large skillet over medium-high heat. Brown ground beef and onion until beef is cooked through (about 8-10 minutes). Drain and return beef and onions to skillet.
- Mix chili powder, salt, garlic powder, and cumin in a bowl. Pour seasoning mixture and water into the skillet. Stir thoroughly to mix with ground beef and onions.
- Reduce heat to low; cover and simmer 8-10 minutes, or until water is absorbed into the mixture.
- Serve on choice of hard or soft shells, with choice of toppings (see ingredients list for suggested toppings).