Combine the graham cracker crumbs and melted butter in a bowl, stirring until the crumbs are evenly coated and resemble wet sand. Press this mixture firmly into the bottom of a 9-inch springform pan, creating an even, compact crust. Chill in the refrigerator for about 10 minutes to firm up.
In a large mixing bowl, beat the softened cream cheese with an electric mixer until smooth and creamy, about 2-3 minutes. Add the sugar and continue beating until fully incorporated and the mixture is fluffy.
Pour in the lemon juice and vanilla extract, mixing briefly just to combine. The lemon adds a bright, tangy flavor that pairs perfectly with the creamy filling.
Gently fold in the whipped cream or sour cream with a spatula until the mixture is smooth and uniform, being careful not to deflate the whipped component. This creates a light, airy texture.
Pour the creamy filling over the chilled crust, spreading it out evenly with a spatula. Smooth the top so it looks level and inviting.
Cover the pan with plastic wrap or a lid and refrigerate for at least 4 hours, or preferably overnight. This allows the cheesecake to set firmly and develop full flavor.
Once set, remove the cheesecake from the fridge, slice with a sharp knife, and serve chilled. The final dessert should be smooth, creamy, and bright with lemon, perfect for a refreshing treat.
