Preheat the oven to 350F. Line a 9x13 baking dish with parchment paper and nonstick spray. Set aside.
Make the crust by combining the graham crackers, brown sugar, and melted butter in a bowl.
Press the mixture into the bottom of the baking dish. Bake in the oven for 10 minutes.
Remove and cool while you make the cheesecake filling.
In a stand mixer, combine the cream cheese, sugar, and brown sugar. Mix on medium speed until smooth. Add in the sour cream, vanilla, heavy cream, salt, and lime juice.
Add in the eggs and combine for 30 seconds. Incorporate the cornstarch into the cheesecake mixture and remove the bowl.
Fold in the chocolate chips by hand. Spread cream cheese mixture over the baked crust.
Bake the cheesecake for 1 hour on the middle rack. Once finished, turn off the oven and open the door. Leave the bars inside to cool slowly for 30 minutes.
Remove from the oven and cool completely on a wire rack. Cover with plastic wrap and chill in the fridge for 8 hours.
Make the ganache by microwaving the heavy cream in a bowl for 1 minute.
Place chocolate chips in a bowl and pour the warmed cream over them. Let them sit for a minute.
Stir with a whisk until smooth.
Remove the cheesecake bars from the fridge.
Pour the ganache over the bars and spread out. Place back in the fridge for 20 minutes to set the ganache.
Once set, remove and cut into 24 bars.
Notes
When you mix the cheesecake mixture, stop and scrape the sides of the bowl with a spatula. This will give you a really smooth cheesecake layer.
Use parchment paper in the pan for easier lifting and slicing.
If you don't have cornstarch, substitute 2 1⁄2 Tablespoons of all purpose flour.
Mini chocolate chips are fun too!
Don't chill too fast, or the bars will crack. Let them come to room temperature before chilling in the fridge.
Preheat the oven before adding the cheesecake bars.