Prep the pan: Heat oven to 325°F (165°C). Line the bottom of a 9-inch springform pan with parchment and lightly mist the sides with nonstick spray.
Make the crust: In a bowl, mix graham crumbs, melted light butter, sweetener, and a pinch of salt until it resembles damp sand.
Press firmly into the bottom of the pan in an even layer.
Par-bake the crust: Bake for 8 minutes. Set aside to cool slightly while you make the filling.
Beat the cream cheese: In a large bowl, beat softened reduced-fat cream cheese with an electric mixer on medium until smooth, about 1 minute. Scrape the bowl.
Add yogurt and dry ingredients: Beat in Greek yogurt, granulated sweetener, granulated sugar, cornstarch, salt, and vanilla until well combined and silky.
Don’t overmix; aim for a smooth batter without lots of air.
Incorporate the eggs: Add eggs and egg white one at a time on low speed, mixing just until blended. Scrape the bowl to ensure a uniform texture.
Fold in chips: Toss mini chocolate chips with a teaspoon of cornstarch or flour (optional, helps prevent sinking), then gently fold into the batter. Reserve a teaspoon to sprinkle on top.
Fill and smooth: Pour the batter over the crust.
Tap the pan on the counter a few times to release bubbles. Sprinkle the reserved chips over the surface.
Bake gently: Place the pan on the middle rack. Bake 40–48 minutes, until the edges are set and the center wobbles slightly like Jell-O.
Avoid overbaking, which causes cracks.
Cool gradually: Turn off the oven, crack the door, and let the cheesecake rest inside for 30 minutes. Move to a rack and cool to room temperature.
Chill to set: Cover and chill at least 6 hours, preferably overnight. This step firms the texture and deepens the flavor.
Slice and serve: Run a thin knife around the edge before releasing the springform.
Warm your knife under hot water and wipe between cuts for clean slices.