Do you use black beans from cans? Just stop. Use this instead. It is easy to make a big pot of it and store in portions in the freezer for whenever you want a burrito, a black bean soup or a plate of nachos. The beans are perfectly creamy and tender, cooked long enough that the cooking liquid thickens into an inky sauce, fragrant with cumin. There is none of the mushiness and goopyness of canned beans; you can keep the salt content to a reasonable level; and the flavor is approximately a million times better. Like any stew, the flavor gets noticeably better if it sits for a few days, so I recommend storing it in the fridge for a while, then portioning out into freezer bags.
I cooked mine in the pressure cooker. I had no idea how long it would take, so I kept checking. After 10 minutes, not much had happened. The beans were still really firm. I brought it back up to pressure and let it go for another 10 minutes. They still needed a bit more, so I settled on 6 minutes. I then cooked them with the lid off for another 15 or so minutes, just to make sure the liquids were thick enough and that I correctly seasoned with salt and pepper.