Preheat oven to 350F.
Add Biscoff cookies and butter to a food processor. Blend well.
Pour Biscoff crumbs into a pie crust. Use the back of a measuring cup to pack the crust tightly and form the crust.
Bake for 8 minutes, remove and let cool to room temp.
While the pie crust bakes, melt 1 cup mini dark chocolate chips by creating a double boiler. Fill a pot with 2 inches of water, place a slightly larger glass bowl on top of the pot, pour the mini chocolate chips into the bowl, and bring the water to a simmer. Use a spatula to stir the chocolate until all of the chocolate has melted.
Mix in 1 tbsp of coconut oil and then pour the melted chocolate onto the crust. Use a spatula to spread the chocolate so that it covers the base of the pie crust. Refrigerate until the chocolate has hardened.
To a large bowl or mixer add ricotta, mascarpone, powdered sugar, vanilla, and orange zest. Use a hand mixer or standing mixer to mix well.
Fold 1 cup mini dark chocolate chips into the ricotta mixture.
Pour filling onto pie crust and use a spatula to evenly distribute the filling.
Top with pistachio and chocolate shavings. Refrigerate until you are ready to serve.
