Start with tortillas that can actually crisp all the way through
The shell can only be as good as the tortilla you start with. Thin corn tortillas usually win because they dry out and stiffen before the center turns leathery, while thicker tortillas often brown outside before they finish crisping inside.
matters because tostadas need structure more than softness. If the tortilla still bends in the middle, heavy toppings like beans, picadillo, or avocado salsa will expose the weakness immediately.


