In a large bowl, mix sugar, flour, and cinnamon using a fork or whisk.
Gently toss the blueberries to coat with the flour mixture.
Spoon blueberry mixture into pastry-lined including any flour mixture that is left in the bowl.
Sprinkle the blueberry mixture with lemon juice and dot with pats of butter.
Cover with top crust.
Flute the edges and vent the pie crust. Simple cuts through the dough will suffice, or you can make a design. I like to add initials or simple cutouts to my pies.
Use a pastry brush and apply the egg wash to the top crust and the fluted edges of the pie.
Cover the pastry edge with aluminum foil strips and bake for 30 minutes. Remove foil and bake for an additional 15 minutes until pie top is a golden brown.
Notes
Special Prep for Frozen Blueberries
If using frozen blueberries follow the steps below and omit steps 2 through 5 in the recipe card. In a large bowl, combine 5 cups of frozen blueberries, 1 cup of granulated sugar, 3 to 5 tablespoons of corn starch or tapioca starch, fresh lemon juice (from 1 lemon), a little lemon zest, and a pinch of salt. Mix well.In a medium saucepan cook the filling for about 15 minutes until the juices are released and the filling has thickened. This will continue to thicken during the oven baking process. Allow filling to cool to room temperature before filling the pie crust.
As with any of my recipes, calorie counts and nutritional information varies greatly depending on which products you choose to use when cooking this dish.