Preheat air fryer to 400 degrees. Set aside a baking sheet.
Add potatoes to air fryer basket and cook until tender when pierced by a paring knife, about 15 to 20 minutes, shaking halfway through cooking.
Transfer potatoes to baking sheet. Using a flat-bottomed measuring cup, press down on each potato to flatten to 1/2-inch thick.
Brush potatoes with olive oil, and sprinkle with seasoned salt. Place potatoes back into air fryer basket and cook until potatoes are crisp and well browned, 15 to 20 minutes more, shaking halfway through cooking.
Notes
Potatoes: This recipe calls for Yukon Gold potatoes because they aren't as waxy as baby potatoes, plus they look cool when they're smashed! You can use whatever variety of potato you prefer like russets, just cut them into bite-sized chunks. Leave the skins on for a rustic side dish.
Oil: Brushing the outside of the potato with oil is optional but recommended. It helps spices adhere to the potato skin and ensures a crispy exterior.
Yield: This recipe makes 4 servings of smashed potatoes (about 4 potatoes each serving).
Storage: Store leftover smashed potatoes in the refrigerator for up to 4 days.