In a medium bowl, mix the graham cracker crumbs, sugar, and melted butter until the mixture resembles wet sand.
Press the crumb mixture firmly into the bottom of a 9-inch springform pan to form an even crust. Refrigerate while preparing the filling.
In a large mixing bowl, beat the softened cream cheese and powdered sugar together until smooth and creamy.
Add the pistachio paste and vanilla extract to the cream cheese mixture, and mix until fully incorporated. Gently fold in the whipped cream until the mixture is light and fluffy. Avoid over-mixing.
Spread the pistachio cheesecake filling evenly over the prepared crust.
Refrigerate the cheesecake for at least 4 hours or overnight to allow it to set properly. Before serving, spread whipped cream over the top and garnish with crushed pistachios.
Slice into servings and enjoy your decadent pistachio cream cheesecake!