Creating the BEST Philadelphia Cheesecake Bars is simple! Just follow these steps:

1. Preheat Oven: Preheat your oven to 325°F (160°C).

2. Prepare Baking Pan: Line a 9×13 inch baking dish with parchment paper, leaving some overhang on the sides for easy removal later.

3. Make the Crust: In a mixing bowl, combine the graham cracker crumbs, ½ cup sugar, and melted butter. Press this mixture evenly into the bottom of the prepared baking dish.

4. Bake the Crust: Place the crust in the preheated oven and bake for 10 minutes. Once done, remove it and set aside to cool slightly.

5. Prepare Cream Cheese Mixture: In another large bowl, combine the softened cream cheese and 1 cup of sugar. Beat with an electric mixer on medium speed until smooth and creamy.

6. Add Eggs: Add eggs one at a time, mixing on low speed until just combined after each addition to avoid overmixing.

7. Incorporate Flavorings: Mix in the vanilla extract and optional lemon juice. Ensure everything is well blended but avoid overworking the mixture.

8. Pour Mixture Over Crust: Pour the cream cheese mixture over the cooled crust, spreading it evenly.

9. Bake: Return the baking dish to the oven and bake for an additional 30-35 minutes, or until the edges are set but the middle is still slightly jiggly.

10. Cool Down: Remove from the oven and let it cool to room temperature for about 30 minutes.

11. Chill: For the best flavors, chill in the refrigerator for at least 4 hours or overnight.

12. Cut and Serve: Once chilled, lift the bars out of the pan using the parchment paper overhang. Cut into squares with a sharp knife and serve with your desired toppings!