Creating your Blueberry Crumble Cheesecake Pie can be a fun and straightforward process! Follow these simple steps to achieve dessert perfection:

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

2. Make the Crust: In a medium bowl, mix graham cracker crumbs, melted butter, and granulated sugar until well combined. Press the mixture firmly into the bottom and sides of the prepared pie pan.

3. Prepare the Cheesecake Filling: In a large bowl, beat softened cream cheese and ¾ cup granulated sugar until smooth. Add the eggs, one at a time, mixing well after each addition. Stir in vanilla extract and sour cream until fully incorporated. Gently fold in the blueberries.

4. Assemble the Pie: Pour the cheesecake filling into the prepared crust, smoothing the top with a spatula.

5. Make the Crumble Topping: In a separate bowl, combine flour, rolled oats, brown sugar, melted butter, and cinnamon to form a crumbly mixture. Sprinkle this evenly over the cheesecake layer.

6. Bake: Place the pie in the preheated oven and bake for 45-50 minutes, or until the cheesecake is set but still slightly jiggly in the center.

7. Cool Down: Remove the pie from the oven and allow it to cool at room temperature for about 30 minutes. Then refrigerate for at least 2 hours, or until completely chilled.