Step 1: Make the crust
- In a medium bowl, combine the graham cracker crumbs, melted butter, and sugar. Mix until evenly combined.
- Press the mixture into the bottom and up the sides of a 9-inch pie dish. Use the back of a spoon or the bottom of a glass to pack it firmly.
- Refrigerate the crust for at least 30 minutes to set.
Step 2: Make the cookie dough filling
- In a large bowl, beat the softened butter and brown sugar with a hand or stand mixer on medium speed until light and fluffy.
- Mix in the vanilla extract and salt.
- Gradually add the heat-treated flour, alternating with the milk, until a smooth dough forms. Fold in the mini chocolate chips.
- Spread the cookie dough evenly into the prepared crust.
Step 3: Prepare the whipped cream topping
- In a chilled bowl, whip the heavy cream, powdered sugar, and vanilla extract until stiff peaks form.
- Spread or pipe the whipped cream over the cookie dough layer.
Step 4: Garnish and serve
- Sprinkle extra mini chocolate chips or drizzle with melted chocolate for decoration.
- Refrigerate the pie for at least 2 hours to firm up before slicing and serving.