Step 1

Preheat oven to 350°F and grease a 9x13-inch baking dish with butter or nonstick spray. Set aside.

Step 2

Make the crust: In a large bowl, beat the flour, sugar, salt, chilled butter, and vanilla with an electric mixer until crumbly.

Step 3

Set aside 1 cup of the mixture. Press remaining mixture firmly into prepared baking dish. Bake 15 minutes.

Step 4

While crust is baking, make the filling: In a large clean bowl, beat the eggs with an electric mixer until frothy.

Step 5

Add sugar, sour cream, flour, and salt, and mix until thoroughly combined. Gently stir in blueberries.

Step 6

Spoon filling evenly over baked crust.

Step 7

Top with reserved 1 cup of crust mixture and bake until top is golden brown, 45-55 minutes.

Step 8

Let cool 1 hour before slicing and serving. Enjoy!