Prep the pan: Lightly grease a 6- or 7-inch springform pan with nonstick spray or butter. Line the bottom with parchment if you like easy release.
If your air fryer has a tight basket, shape a foil sling to help lift the pan out later.
Make the crust: In a bowl, mix graham cracker crumbs, melted butter, a pinch of salt, and 1 tablespoon sugar from the measured sugar if you like a touch of sweetness. Stir until it resembles wet sand.
Press the crust: Firmly press the mixture into the bottom and about 1 inch up the sides of the pan. Use the bottom of a measuring cup for a compact, even layer.
Par-bake the crust: Preheat the air fryer to 325°F (165°C) for 3 minutes.
Air fry the crust for 6–7 minutes until lightly golden and set. Let it cool while you make the filling.
Beat the cream cheese: In a mixing bowl, beat softened cream cheese on medium speed until completely smooth, about 1–2 minutes. Scrape the bowl well to avoid lumps.
Add sugar and flavor: Add the remaining granulated sugar and beat until creamy.
Mix in vanilla and lemon zest (if using). Blend in sour cream just until combined.
Add eggs gently: Add the eggs one at a time on low speed, mixing just until incorporated. Do not overmix; too much air can cause cracks.
Fill the pan: Pour the batter over the cooled crust. Tap the pan on the counter a few times to pop surface bubbles.
Smooth the top with an offset spatula.
Air fry the cheesecake: Place the pan in the air fryer basket. Cook at 300°F (150°C) for 25–35 minutes, depending on your model and pan size. The edges should be set, and the center should still jiggle slightly, like set Jell-O.
Rest in the basket: Turn off the air fryer and let the cheesecake rest inside with the basket partially open for 10 minutes.
This gentle cool-down helps prevent cracking.
Cool completely: Remove the pan using the foil sling or tongs. Run a thin knife around the edge to loosen. Cool on a rack until room temperature, about 1–2 hours.
Chill to set: Cover and refrigerate for at least 4 hours, preferably overnight.
This step makes the texture ultra-creamy and easier to slice.
Serve: Unmold the springform, slice with a hot, clean knife, and wipe between cuts. Top with berries, caramel, or a dollop of whipped cream if you like.