
Preheat oven to 325°F (163°C). Lightly grease the bottom and the sides of a 9-inch springform pan or line with parchment paper.
In a bowl, mix graham cracker crumbs, melted butter, and sugar until evenly combined.
Press the mixture firmly into the bottom of the prepared pan. Bake for 8–10 minutes, then let cool.
In a large bowl, beat cream cheese, sugar, and cornstarch until smooth.
Add eggs one at a time, beating on low speed. Use a spatula to scrape down the sides of bowl. Do not overmix—beat just until combined.
Mix in sour cream, vanilla extract, and lemon juice until just combined.
Pour filling over the cooled crust and smooth the top.
Bake for 45-50 minutes, or until the center is set but slightly jiggly.
Turn off the oven and let the cheesecake cool inside with the door slightly open for 1 hour. You can pinch a wooden cooking spoon in the oven door.
Refrigerate for at least 4 hours or overnight before serving.