To make chips, slice the tortillas into 6 wedges. (Leave the tortillas whole if you’re making tostadas.) Cover a large swath of countertop with clean brown paper bags, newspaper, kitchen towels ...
Ingredient Note: To make your own tostada shells, heat oil in a 12-inch skillet over medium-high heat. Add 8 corn tortillas in batches and cook until they're crisp. Drain the tostadas on paper towels.