01 -
Preheat the oven to 350°F. Line an 8x8-inch baking pan with parchment paper, ensuring some overhang for easy removal.
02 -
In a medium bowl, combine all-purpose flour, granulated sugar, salt, and melted butter until a crumbly dough develops. Press the mixture evenly into the prepared pan. Bake for 10 minutes.
03 -
Using a bowl and electric mixer or whisk, beat cream cheese and granulated sugar until smooth. Add in the egg and vanilla extract; blend until just combined. Pour and spread evenly over the baked crust.
04 -
In a separate bowl, toss diced apples with brown sugar, ground cinnamon, nutmeg, and lemon juice to evenly coat. Distribute the apple mixture over the cheesecake layer.
05 -
In another bowl, combine all-purpose flour, rolled oats, brown sugar, and cinnamon. Add cold, cubed butter and work into the dry mixture using fingers or a pastry blender until coarse crumbs form. Sprinkle the topping evenly over the apple layer.
06 -
Bake for 35 to 40 minutes until the topping turns golden brown and the center is set. Cool completely in the pan, then refrigerate for at least 2 hours before cutting into bars.