Step 1

Preheat oven to 325 degrees. In a food processor, or in a plastic bag with a rolling pin, finely crush graham crackers.

Step 2

In a medium bowl, combine graham cracker crumbs, butter, and sugar. Pour into a 9-inch pie plate, using the bottom of a measuring cup to press the crust evenly and firmly into the bottom and up the sides of the pie plate.

Step 3

Bake until golden brown and fragrant, 15 to 20 minutes. Remove from oven and cool completely, at least 1 hour.

Step 4

In a large bowl combine sugar, cream cheese, and vanilla extract. Stir until evenly blended. Add cocoa powder and milk in alternating batches, a few tablespoons at a time, until evenly incorporated.

Step 5

Gently fold in whipped topping until well-combined. Pour into cooled crust and smooth the top with a spatula. Freeze at least 4 hours or until serving (up to 1 month in advance).

Step 6

Thaw for 5 to 10 minutes before slicing. Drizzle individual pieces with chocolate syrup if desired.