Add all your ingredients to the slow cooker, stirring so everything is combined.
Close lid and cook on HIGH for 4 hours. After 4 hours, if your beans aren't soft, cook for 30 minutes more. You can also cook on LOW for 6-8 hours, checking them at the 6 hour mark.
Serve on tortillas for black bean tacos and enjoy! (Or use them for any other delicious recipe!)