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1. In a medium bowl, combine the chocolate cookie crumbs and melted butter. Mix well until the crumbs are fully coated and resemble wet sand.
2. Press the mixture firmly into the bottom and up the sides of a 9-inch pie dish. Make sure to pack it tightly to create a sturdy crust.
3. Once the crust is formed, place it in the refrigerator for about 30 minutes to set.
4. In a small saucepan over low heat, combine the semi-sweet chocolate chips and milk. Stir continuously until the chocolate is completely melted and smooth. Remove from heat and let it cool slightly.
5. In a large mixing bowl, beat the softened cream cheese with an electric mixer until smooth and creamy (about 2-3 minutes).
6. Add the granulated sugar, cocoa powder, and vanilla extract to the cream cheese. Mix until well combined and there are no lumps.
7. In a separate bowl, whip the heavy cream until stiff peaks form (about 3-5 minutes). Be careful not to over-whip.
8. Gently fold the whipped cream into the cream cheese mixture using a spatula. Start by adding a small amount of whipped cream to lighten the mixture, then gradually fold in the rest until fully incorporated.
9. Once the chocolate mixture has cooled slightly, fold it into the cream cheese and whipped cream mixture until smooth and creamy.
10. Take the chilled crust out of the refrigerator. Spoon the chocolate filling into the crust, spreading it evenly with a spatula.
11. Smooth the top with the spatula or the back of a spoon, creating swirls or peaks if desired.
12. Cover the pie with plastic wrap or aluminum foil and return it to the refrigerator. Let it chill for at least 4 hours, or overnight if possible.
13. When ready to serve, remove the pie from the refrigerator. Garnish with chocolate shavings or a dollop of whipped cream if desired.
14. To create chocolate shavings, use a vegetable peeler to shave thin pieces from a chocolate bar and sprinkle them over the top.
15. Slice the pie into wedges using a sharp knife. For cleaner slices, dip the knife in hot water and wipe it dry before cutting each piece.
16. Serve immediately and enjoy!

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