Preheat the oven to 350°F and prepare an 8x8 baking dish with parchment paper.
CRUMBLE CRUST AND TOPPING
Place the graham crackers and pretzels into a food processor and pulse until they've been reduced to crumbs. A few larger pieces are ok. Place the crumbs into a bowl and add the brown sugar and melted butter. Stir with a spoon until fully mixed in.
Pour about ¾ of the crumble into the baking pan (save the rest for the topping). Press into the bottom with your fingers first and then a flat bottom cup. Bake the crust for 8-10 minutes and then remove to a cooling rack to cool while preparing the rest of the ingredients.
CHEESECAKE FILLING
Place the cream cheese and sugar into a bowl and beat with a hand mixer until smooth. Add the egg and vanilla and continue to beat until incorporated. Scrape the side of the bowl if needed to get everything mixed in.
Spread the cheesecake filling on top of the crumble bottom.
CINNAMON APPLES
Peel and core the apples and cut them into small pieces. Add the brown sugar and cinnamon and stir to fully coat the apples.
Spread the apples on top of the cheesecake layer. Sprinkle the remaining crumble on top of the apples.
Bake for 40 minutes until set. Allow the bars to cool on a rack for 30 minutes and then continue to cool and set them in the fridge for 2-3 hours.
Before serving, drizzle the top with caramel sauce, and enjoy!
Notes
I highly recommend using parchment paper to line your baking dish before baking. Not only does it make clean-up easier, but it also helps remove the bars from the pan.
Cut the apples into ½" pieces or smaller so that every bite has delicious apples in them. Just eyeball it, it doesn't have to be perfect.
Room-temperature cream cheese is essential so that all of the filling ingredients blend together. You can zap it in the microwave at 15-second intervals or place the sealed package in warm water if you forget to pull it out of the fridge ahead of time.
The bars are done when the center no longer wiggles. A slight movement is ok, the bars will continue to set as they cool so don't leave them in the oven too long.
You can easily double this recipe and use a larger baking dish if desired.
These bars will last 2-3 days covered in the fridge.