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

1. Preheat the Oven: Preheat your oven to 325°F (160°C). Grease a 9×9-inch baking pan.

2. Make the Crust: In a medium bowl, combine graham cracker crumbs, sugar, and melted butter. Mix until well combined.

3. Press the Crust: Pour the crumb mixture into the prepared baking pan. Press it firmly into an even layer across the bottom.

4. Bake the Crust: Place the crust in the preheated oven and bake for 10-12 minutes, or until lightly golden. Remove from the oven and let it cool slightly.

5. Prepare the Filling: In a large bowl, beat the softened cream cheese until smooth. Gradually add sugar and beat until creamy.

6. Add Eggs: Add the eggs one at a time, mixing well after each addition.

7. Incorporate Other Ingredients: Mix in sour cream, flour, lemon zest, lemon juice, and vanilla extract until everything is well blended.

8. Pour Filling over Crust: Pour the cheesecake filling over the cooled crust and spread it evenly.

9. Bake the Cheesecake: Return the pan to the oven and bake for 30-35 minutes, or until the filling is set around the edges but slightly jiggly in the center.

10. Cool Down: Remove from the oven and let the bars cool at room temperature for about 1 hour. Then refrigerate for at least 1 hour before slicing.

11. Slice and Serve: Cut into squares and serve chilled.

These steps will guide you through creating these incredible bars with ease!