1-First Step: Prepare the Crust Preheat your oven to 350°F (175°C). In a medium bowl, combine the graham cracker crumbs, melted butter, and sugar. Mix until the crumbs are evenly coated with the butter. Press the mixture firmly into the bottom of an 8×8-inch square baking pan. Use the back of a spoon or a measuring cup to ensure the crust is compact and even. Bake the crust for 10 minutes, then remove from the oven and let it cool while you prepare the filling.

2-Second Step: Prepare the Cheesecake Filling In a large bowl, beat the softened cream cheese with an electric mixer until smooth and creamy. Add the sugar and continue to beat until well combined. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract and sour cream until the filling is smooth and lump-free. Be careful not to overmix, as this can incorporate too much air into the filling and cause cracks during baking.

3-Third Step: Pour the Filling and Bake Pour the cheesecake filling over the pre-baked crust, spreading it evenly. Reduce the oven temperature to 325°F (165°C). Bake the cheesecake bars for 35-40 minutes, or until the edges are set but the center still jiggles slightly when the pan is gently shaken. The filling should be pale and slightly puffy around the edges.

4-Fourth Step: Cool and Chill Remove the cheesecake bars from the oven and place the pan on a wire rack. Let the bars cool to room temperature for about an hour. Once cooled, cover the pan and refrigerate for at least 4 hours, or overnight, to allow the cheesecake to set completely. The bars should be firm and cold before cutting.

5-Final Step: Cut and Serve Once the cheesecake bars are thoroughly chilled, remove them from the refrigerator. Run a knife around the edges of the pan to loosen the bars, then lift them out using the parchment paper overhang. Place the bars on a cutting board and cut into 16 equal squares. For clean cuts, wipe the knife clean between each slice. Serve the bars as they are, or add toppings like fresh fruit, chocolate drizzle, or whipped cream for extra flair.