In a large slow cooker add dried beans, taco seasoning, onion, boullion and water (or broth if using). Cover crock and let sit over night.
In the morning, add green chilies. If there is no water left (it was all absorbed by the beans), add 2 cups of water or broth. Replace the lid and let cook on low for 8 hours.
Around the 4 hour mark, check for moisture levels. If it is looking dry, add one cup of water. This is also the time to start to mash the beans some.
In the last hour, again check for moisture level and mash the beans some. This is the time to taste test and add salt if needed.
The beans should be soft enough to smush but still have enough body to maintain shape.
Keyword black beans, green chilies, homemade taco seasoning, slow cooker, taco seasoning