Creating these Creamy Lemon Cheesecake Crumb Bars is simple if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×9-inch baking dish or line it with parchment paper for easy removal.

2. Make the Crust: In a medium bowl, combine graham cracker crumbs, granulated sugar, and melted butter. Mix until well combined. Press the mixture firmly into the bottom of the prepared baking dish.

3. Bake the Crust: Bake the crust in the preheated oven for 10 minutes, then remove it and let it cool slightly.

4. Prepare the Filling: In a large mixing bowl, beat the softened cream cheese until smooth. Gradually add granulated sugar and continue to beat until well combined and creamy.

5. Add Eggs: Add the eggs one at a time, mixing well after each addition. Make sure to scrape down the sides of the bowl to incorporate everything.

6. Mix in Other Ingredients: Add sour cream, fresh lemon juice, lemon zest, and vanilla extract. Mix until the filling is smooth and creamy.

7. Pour Filling Over Crust: Pour the cheesecake filling over the cooled crust, spreading it evenly.

8. Bake: Return the baking dish to the oven and bake for 20-25 minutes, or until the filling is set and slightly firm to the touch.

9. Cool: Remove from the oven and allow the bars to cool at room temperature for about 30 minutes. Then, refrigerate for at least 2 hours or until fully chilled and set.

10. Slice and Serve: Once chilled, slice into squares and dust with powdered sugar if desired before serving.

By following these steps, you’ll create the most delicious Creamy Lemon Cheesecake Crumb Bars that are sure to impress!