Preheat the oven to 325°F.
In a microwave-safe bowl, melt the white chocolate chips in 30-second intervals, stirring in between until smooth. Let it cool slightly.
In a large mixing bowl, beat the softened cream cheese and granulated sugar together until creamy and smooth.
Add the melted white chocolate and vanilla extract to the cream cheese mixture, mixing until well combined.
Add the eggs one at a time, mixing on low speed after each addition until just combined. Do not overmix.
Stir in the sour cream and heavy cream until smooth.
Pour the cheesecake batter into the pre-made graham cracker crust, smoothing the top with a spatula.
Bake in the preheated oven for 50-60 minutes, or until the center is set but still slightly jiggly.
Turn off the oven and crack the oven door, allowing the cheesecake to cool in the oven for 1 hour.
Remove from the oven and refrigerate for at least 4 hours, preferably overnight, before serving.