Preheat the Oven
Preheat your oven to 375°F (190°C). This ensures your crust starts baking right away and turns beautifully golden.
Prepare the Filling
In a large bowl, combine the blueberries, sugar, cornstarch, lemon juice, lemon zest, salt, and vanilla. Stir gently so the berries stay whole but everything gets coated.
Prepare the Pie Crust
Place the bottom crust into a 9-inch pie pan. Press it gently into the edges and trim any extra dough.
Add the Filling
Pour the blueberry mixture into the crust and spread it evenly. Dot the top with small pieces of butter for extra flavor.
Add the Top Crust
Cover the pie with the second crust. Seal the edges by crimping them with your fingers or a fork. Cut a few small steam vents in the top.
Optional Egg Wash
Whisk together the egg and milk, brush it over the crust, and sprinkle with coarse sugar. This step gives your pie that shiny bakery finish.
Bake the Pie
Bake for 45–50 minutes, or until the crust is golden and the filling is bubbling through the vents.
Cool Before Serving
Let the pie cool for at least 2 hours before slicing. Yes, waiting is hard—but cutting too soon makes the filling run everywhere.