Creating delicious Creamy Lemon Cheesecake Crumb Bars can be simple when following these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease an 8×8-inch baking dish.
2. Make Crust: In a medium bowl, combine graham cracker crumbs, sugar, melted butter, and salt. Mix until well combined.
3. Press Crust: Press the crust mixture evenly into the bottom of the prepared baking dish. Bake for 10 minutes and then remove from the oven.
4. Prepare Filling: In a large mixing bowl, beat the softened cream cheese and granulated sugar until smooth.
5. Add Eggs: Beat in the eggs, one at a time, ensuring they are fully incorporated.
6. Combine Ingredients: Stir in sour cream, lemon zest, lemon juice, and vanilla extract until the mixture is creamy and smooth.
7. Bake Filling: Pour the cheesecake filling over the pre-baked crust. Bake in the preheated oven for 30-35 minutes until set.
8. Cool: Once baked, remove from the oven and let cool in the pan for 30 minutes.
9. Prepare Topping: In a bowl, combine flour, sugar, cubed cold butter, and cinnamon. Use a pastry cutter to create a crumbly texture.
10. Add Topping: Sprinkle the crumb topping evenly over the cheesecake filling.
11. Final Bake: Place the dish back in the oven and bake for an additional 10 minutes.
12. Chill: Allow the bars to cool completely, then refrigerate for at least 2 hours before slicing.
13. Serve: Cut into squares and enjoy the delicious Creamy Lemon Cheesecake Crumb Bars!