Place the tortillas in a single layer on a baking sheet.
Lightly brush or spray both sides of the tortillas with oil.
Sprinkle tortillas with salt, if using.
Bake for 12 to 15 minutes, or until the edges start to brown.
Fried Tostada Shells
Line a tray with a paper towel, and set aside.
Add the oil to a cast iron pan until it’s about 1/2 inch deep. Heat on medium-high until the oil reaches 350°F.
Add a corn tortilla to the hot oil.
Cook until the tortilla is crispy and golden brown, about 2-3 minutes.
Using tongs or a slotted spoon transfer tostadas to drain on paper towel lined tray and sprinkle lightly with salt, if desired. Repeat with the remaining tortillas.
Notes
Air fryer tostada shells: Air fry lightly oiled tortillas at 350°F in a single layer until golden brown and crispy, 5 to 7 minutes. Check on them as they cook to ensure they do not over cook.
Storage
Let the tostada shells cool completely to room temperature before placing them in storage. This will prevent condensation from building up and making them stale.
Homemade corn tortilla shells will keep well in an airtight container or ziplock bag for up to 5 days.