Start by soaking the black beans overnight or for 8 hours. You can use canned if you like and skip the soaking but I think dried beans have a more pleasing texture in the end.
Cover the beans with enough water to just cover. Bring to a boil, then simmer until and cook until most of the water is gone and the beans are soft.
Mash the beans up until they are creamy.
Season with salt, pepper, cumin, and garlic powder.