01 - Combine graham cracker crumbs, sugar, and melted butter in a medium bowl until fully mixed. Press the mixture firmly into the bottom of a 9-inch springform pan.
02 - Preheat the oven to 350°F (175°C). Bake the crust for 10 minutes, then cool completely on a rack.
03 - Using a stand mixer fitted with the paddle attachment, beat softened cream cheese on medium speed until smooth. Add sugar and vanilla, mixing until combined. Add eggs one at a time, mixing on low speed and scraping the sides after each addition. Blend in sour cream and heavy cream until batter is evenly mixed.
04 - Pour filling into the cooled crust, smoothing the top with a spatula. Bake at 325°F (163°C) for 55–65 minutes, or until center is just set and the top appears slightly firm. Remove from oven and cool completely at room temperature.
05 - Transfer pan to the refrigerator and chill uncovered for at least 4 hours, preferably overnight. Release sides of springform pan before slicing and serving.