Warm the oil in a large skillet over medium-high heat.
2 teaspoons olive or avocado oil
Stir in the chopped onion and jalapeño, and cook for 4-5 minutes, stirring occasionally, until they begin to soften.
1 small onion, chopped, 1 jalapeño pepper
Stir in the garlic, salt, cumin, chipotle powder, and cayenne. Cook just until fragrant, about 30 seconds.
2 cloves garlic, 3/4 teaspoon kosher salt, 3/4 teaspoon ground cumin, 1/2 teaspoon chipotle chili powder, 1/8 teaspoon cayenne pepper
Stir in the beans, followed quickly by the broth. Bring to a boil, then reduce heat to medium and simmer until the beans are tender and most of the liquid has evaporated. This should take 8-10 minutes; if it bubbles too rapidly, the beans will be less flavorful and can get a little dry.
2 (15 ounce) cans black beans, 1 cup vegetable broth
When the beans reach the right consistency for you, reduce or turn off the heat, stir in the lime juice and chopped cilantro, and add more salt or cayenne to taste.
squeeze of lime juice, 1-2 teaspoons fresh cilantro leaves
Assemble tacos as desired and serve!
Tortillas, Pico de gallo, Guacamole, Pickled onions, Cotija, tomatoes, etc.