Prepare your pie crust recipe and place bottom crust in your 9 in pie pan.
In a large mixing bowl mix together 3 cups mulberry's, 1 ¼ cup white sugar, and ¼ cup flour and mix well.
Place mixture into pie crust and spread evenly.
Cut butter into small pieces and dot throughout the pie.
Center top pie crust over and pie and crimp edges well.
Tear off remaining crust from edges.
Brush milk over the top of the pie crust.
Tear strips of aluminum foil and gently fold over the edges of the pie to cover the outermost inch of the pie to keep the edges from burning.
Set pie in refrigerator to rest for 30 minutes.
In the meantime pre-heat oven to 400° F.
Bake pie at 400° F for 15 minutes.
Drop temperature down to 350° F and bake for an additional 30 minutes. (During the last 15 minutes of baking sprinkle 1 ½ teaspoon of sugar over pie for a nice touch.
Remove pie from oven and cool on wire rack.
