Follow these simple steps to create your mouthwatering Raspberry Swirl Cheesecake Bars:

1. Preheat the Oven: Preheat your oven to 325°F (160°C). Prepare a 9×9-inch baking pan by lining it with parchment paper, allowing some overhang for easy removal later.

2. Make the Crust: In a medium bowl, combine graham cracker crumbs, melted butter, and ¼ cup sugar. Mix until well combined. Press the mixture firmly into the bottom of the prepared pan to form an even layer. Bake for 10 minutes, then remove from the oven to cool.

3. Prepare the Raspberry Swirl: In a small saucepan over medium heat, combine raspberries, ¼ cup sugar, and lemon juice. Cook until the raspberries break down, about 5 minutes, stirring occasionally. Remove from heat and let cool slightly.

4. Blend the Cheesecake Filling: In a large mixing bowl, beat the softened cream cheese and 1 cup sugar together until smooth. Add the vanilla extract and mix until well combined. Then, add the eggs one at a time, mixing well after each addition. Finally, stir in the sour cream until smooth.

5. Assemble the Bars: Pour the cheesecake filling over the cooled crust, spreading evenly. Drizzle the raspberry mixture over the cheesecake filling. Use a knife or toothpick to swirl the raspberry into the cheesecake gently.

6. Bake: Place the baking pan in the preheated oven and bake for 30-35 minutes or until the center is set but still slightly jiggly. Remove and allow to cool at room temperature for about 1 hour.

7. Chill: Once cooled, refrigerate for at least 2 hours to firm up the bars before slicing.

8. Slice and Serve: Remove from the baking pan using the parchment overhang, slice into squares, and enjoy!

These steps guide you in creating your incredible Raspberry Swirl Cheesecake Bars without any fuss.