Preheat your oven to 400°F and place corn tortillas on a baking sheet. Lightly spray or brush both sides with oil to help them crisp up, then bake for 4-5 minutes, flipping halfway through, until they are golden and crunchy. Keep an eye on them, as every oven is different, and they will continue to crisp up slightly as they cool.
Once the tostada shells are ready, it’s time to assemble. Spread a layer of creamy refried black beans onto each crispy tortilla, then pile on the slow cooker carnitas, making sure to get some of those crispy edges in every bite.
Top with shredded lettuce, fresh pico de gallo, sliced avocado, and crumbled cheese for extra texture and bold flavor.
Drizzle with chipotle crema or cilantro lime crema for a creamy, zesty finish, and serve with a lime wedge on the side.
Enjoy immediately while everything is perfectly crisp and fresh!