Stack the corn tortillas and cut them into 6 even wedges each using a sharp chef's knife. Lay the wedges out in a single layer on a clean kitchen towel or paper towels for 10 to 15 minutes to dry out surface moisture.
Pour 2 to 3 cups (480 to 720 ml) of neutral oil into a heavy-bottomed pot or cast iron skillet, ensuring the oil is at least 1.5 inches (about 4 cm) deep. Heat the oil to 350°F to 360°F (175°C to 182°C), using an instant-read thermometer to monitor the temperature.
Carefully lower 8 to 10 tortilla wedges into the hot oil using a spider strainer or slotted spoon, ensuring not to overcrowd the pot. Fry for 1.5 to 2 minutes, turning once or twice, until the chips turn a light golden color and bubbling subsides.
Remove the chips promptly and transfer them immediately to a wire rack set over a sheet pan. Allow the oil temperature to return to 350°F (175°C) before adding the next batch, which usually takes 30 to 60 seconds.
While the chips are still hot and glistening, sprinkle them immediately with fine sea salt. If using optional seasonings like chili powder, smoked paprika, garlic powder, or lime zest, toss the hot chips gently in a large mixing bowl with your chosen seasonings right away.
Preheat your oven to 400°F (200°C) and line one or two large baking sheets with parchment paper. Arrange the tortilla wedges in a single layer on the prepared baking sheets, making sure no wedges are overlapping.
Using a pastry brush, lightly coat the top surface of each wedge with 2 tablespoons (30 ml) of neutral oil. Sprinkle evenly with 1/2 teaspoon (2.5 g) of sea salt and any optional seasonings.
Bake for 10 to 14 minutes, flipping the chips over at the halfway mark (around the 6 to 7 minute point). Remove from the oven when the chips are golden and feel firm to the touch, as they will continue to crisp up slightly as they cool.