Rinse pinto beans, and place them in the crockpot with water, onion half, garlic powder, seasoned salt, cumin, cayenne pepper, and liquid smoke. Cook on HIGH for 8 hours.
After eight hours, discard the onion and drain most of the excess water but reserve. Use a potato masher, or immersion blender to achieve desired consistency. Add back reserved liquid when blending as needed. I used my immersion blender to make my beans smooth, and on the thinner side. Remember that the beans will thicken up a bit as they cool.
Taste the beans for seasoning, and add additional salt and pepper according to your taste.