Preheat the oven to 450°F. Line a large baking sheet with aluminum foil and spray it with cooking spray.
Prep the potatoes: Wash and dry the potatoes, then add them to the prepared baking sheet. Drizzle the oil onto the potatoes and use your hands to mix the potatoes to coat. Space the potatoes ½ inch apart, then sprinkle them evenly with the salt and pepper.
Bake: Bake the potatoes until tender when pierced with a knife, about 25 minutes.
Smash and dress the potatoes: Remove the potatoes from the oven and use the bottom of a drinking glass to smash them flat. To prevent sticking, spray a little cooking spray onto the bottom of the glass as needed. Use a pastry brush to brush 2 tablespoons of the Caesar dressing onto the potatoes. Sprinkle ¼ cup of the Parmesan cheese evenly over the top.
Bake again: Bake the dressed potatoes until the edges start to get golden brown and crispy, about 15 minutes. Remove the smashed potatoes from the oven. While the potatoes are still hot, brush on the remaining 2 tablespoons of Caesar dressing. Sprinkle with the remaining ¼ cup Parmesan cheese and the parsley, if using. Serve immediately with an extra drizzle of Caesar dressing or a small bowl for dipping on the side, if desired. Love the recipe? Leave us stars and a comment below!
