Heat oil in a heavy-bottomed pan over medium-high heat. To make sure the oil is at the right temperature, give it 4-5 minutes to heat up before you add the tortilla. The most exact way to know is to use an instant read deep fry thermometer. The oil should be between 350°F-375°F degrees.

Once oil is hot, add 1 tortilla at a time and fry. Let the tortilla fry on one side until it is lightly golden before turning and cooking the other side, this should take about 2 minutes.

Remove to a paper towel-lined baking sheet and continue with remaining tortillas. Sprinkle tostadas with salt while still warm.