Makes 1 pie with two crusts.

A full cup of sugar is decadent. The sugar doesn't really change the structure much, so you can decrease it to taste.

Substituting cornstarch with arrowroot starch does not work.

Ingredients Step
Preheat oven to 450 degrees.
1 pie crust Line a pie plate with a crust. Place pie plate on a cookie sheet to stabilize and catch drips.
2 T. cornstarch (not arrowroot)
freshly squeezed juice of ½ lemon
2 t. vanilla
2 t. brandy
Thoroughly combine into paste in small mixing bowl.
4½ c. blueberries (fresh or frozen)
up to 1 c. sugar
paste from above
2 T. butter, chopped
1 T. flour
heaping 1 T. sour cream
scant ¼ t. cinnamon
Gently stir together in large mixing bowl until just combined.
1 crust Pour berries into bottom crust, then cover pie with a top crust that has decorative vents.
Bake for 10-15 minutes at 450 degrees, then reduce heat to 350 degrees and bake until golden brown and bubbly (maybe 45-55 minutes more).
Cool completely before serving.

Source: The Grit