Soak them overnight. The next day, discard the water. Put them in a slow cooker or crock pot with fresh water. Add cilantro or other herb, maybe salt, cumin, or whatever spice you like. let them cook slow for maybe 5-6 hours until mushy. Discard water again. Use a potato masher to mash them up while they're still hot. You can also use a mixer, but you want to leave a few lumps or whole beans. Prepare with added spices and/or grated cheddar and/or jack cheese. Mix in salsa or peppers if desired.

Because they are so thick, be careful when reheating. They burn easily.