Line the baking dish with parchment paper, leaving some overhang for easy removal.
In a mixing bowl, combine the graham cracker crumbs, melted butter, and granulated sugar. Mix until well combined.
Press the crumb mixture firmly into the bottom of the lined baking dish to form the crust. Set aside.
In a separate bowl, beat the softened cream cheese, granulated sugar, and vanilla extract using an electric mixer until creamy and smooth.
Gently fold in the whipped cream until fully incorporated. Pour the cheesecake mixture over the prepared crust and spread it evenly.
To make the cookie dough topping, beat the softened butter, brown sugar, and granulated sugar in another bowl until light and fluffy. Add the vanilla extract and mix well.
Gradually mix in the heat-treated flour and salt, then add the mini chocolate chips and milk. Stir until combined.
Scoop the cookie dough mixture over the cheesecake layer and spread it out evenly.
Cover the dish with plastic wrap and refrigerate for at least 4 hours or until set.
Once set, lift the bars from the baking dish using the parchment paper overhang. Cut into 12 equal bars and serve. Enjoy!