To make the crust: Preheat oven to 350 degrees F. Place Biscoff cookies in food processor and pulse until they become fine crumbs. Set aside 2 tablespoons of crumbs for topping the pie later.
Add melted butter and sugar in food processor with crumbs. Pulse again until the cookie crumbs resemble wet sand.
Scrape into 9 inch pie pan and use a spoon to press into the side of the pan. Make sure it is even, then bake in oven for 10 minutes. Take out of oven and place and wire rack to cool.
For dark chocolate layer: Put dark chocolate chips and heavy cream into microwavable bowl and microwave for 30 seconds. Take out of microwave and stir until all of the chocolate chips are melted and it resembles chocolate sauce. Pour on top of Biscoff crust, and carefully spread a thin layer evenly over the bottom. Set aside.
To make the peanut butter filling: Place heavy whipping cream and granulated sugar in large bowl. Using an electric mixer, beat until heavy and thick. Set aside.
In a separate large bowl, combine the peanut butter, whipped cream cheese, and powdered sugar until creamy. Add in milk and stir again.
Slowly fold in whipped cream until well combined. Pour in pie pan on top of the dark chocolate layer spreading evenly.
For raspberry swirl: Microwave raspberry jam for 30 seconds in microwavable bowl. Stir when done and drizzled on top of peanut butter filling.
Take a butter knife and swirl around 10-20 times. Sprinkle 2 tablespoons of leftover Biscoff cookie crumbs on top.
Place pie in refrigerator for 4 hours. Garnish with extra dark chocolate if desired. Serves 9.