Follow these easy steps to create your incredible Pistachio Cheesecake:

1. Preheat the Oven: Preheat your oven to 325°F (160°C). Prepare a 9-inch springform pan by greasing it or lining the bottom with parchment paper.
2. Prepare the Crust: In a medium bowl, combine the graham cracker crumbs and melted butter. Mix until the crumbs are evenly coated. Press the mixture firmly into the bottom of the prepared pan to form the crust.
3. Bake the Crust: Place the crust in the preheated oven and bake for 10 minutes. Remove from the oven and let it cool while you prepare the filling.
4. Make the Filling: In a large mixing bowl, beat the softened cream cheese with granulated sugar until smooth and creamy. This should take about 2-3 minutes.
5. Add Eggs: Add the eggs one at a time, mixing on low speed after each addition until just combined. Be careful not to overmix.
6. Incorporate Remaining Ingredients: Add the sour cream, vanilla extract, chopped pistachios, and pistachio paste (if using). Mix until everything is well combined.
7. Pour the Filling: Carefully pour the cheesecake filling over the cooled crust, spreading it evenly.
8. Bake the Cheesecake: Bake in the preheated oven for 50-60 minutes, or until the center is set but still slightly jiggly. The edges may slightly puff up.
9. Cool Gradually: Turn off the oven and crack the door open. Let the cheesecake cool in the oven for about 1 hour. This helps prevent cracks.
10. Chill: After an hour, remove the cheesecake from the oven and refrigerate for at least 4 hours or overnight for best results.
11. Serve: When ready to serve, carefully remove the cheesecake from the springform pan. Slice and enjoy!