- Preheat oven to 350°F (175°C). 
- Mix graham cracker crumbs, melted butter, and brown sugar in a bowl. 
- Press firmly into a 9-inch pie pan, covering the base and sides. 
- Bake for 8–10 minutes until set. Cool completely. 
- Heat heavy cream until warm (do not boil). 
- Pour over chocolate chips in a heatproof bowl 
- Let sit for 1–2 minutes, then stir until smooth. 
- Spread evenly over the cooled crust. Refrigerate for 20 minutes. 
- Beat butter, brown sugar, and granulated sugar until fluffy. 
- Add vanilla extract and milk; mix well. 
- Gradually fold in heat-treated flour and salt. 
- Stir in mini chocolate chips until evenly distributed. 
- Spread the cookie dough filling over the chilled chocolate layer. 
- Smooth with a spatula for an even finish. 
- Sprinkle extra chocolate chips on top. 
- Refrigerate for at least 1 hour to set. 
- Slice and serve chilled for best texture.