Heat olive oil in a skillet over medium heat.
Add the rinsed black beans to the skillet.
Sprinkle in cumin and chili powder, stirring to combine.
Cook for 5-7 minutes until heated through.
In a separate pan, warm the corn tortillas for about 30 seconds on each side.
Once the beans are ready, season with salt and pepper to taste.
Assemble the tacos by placing a generous amount of black beans on each tortilla.
Top with sliced avocado and fresh cilantro.
Add optional toppings like sour cream or salsa if desired.
Serve with lime wedges for a zesty finish.