Blackberry Pie from Stefanie

I have been picking blackberries this week and here is the recipe I like the most for blackberry pie.
This is a simple recipe with exceptional results.

Blackberry Pie
Ingredients:
4 cups fresh blackberries 1 recipe pastry for a 9 inch double crust pie
1/2 cup white sugar 2 tablespoons milk
1/2 cup all-purpose flour 1/4 cup white sugar
Directions:
1. Combine 3 1/2 cups berries with the sugar and flour. Spoon the mixture into an unbaked pie shell. Spread the remaining 1/2 cup berries on top of the sweetened berries, and cover with the top crust. Seal and crimp the edges. Brush the top crust with milk, and sprinkle with 1/4 cup sugar...I use less.
2. Bake at 425 degrees for 15 minutes. Reduce the temperature of the oven to 375 degrees and bake for an additional 20-25 minutes.