Old-fashioned Blackberry Pie

Description
Purchased from Tibbenham Estate in Anna, Texas in 1997. Dated 1962. Indicates this was Sara Beth's favorite pie.
 * Contributed by Cat's Recipes Y-Group

Ingredients

 * 2 tablespoons unsalted butter, softened
 * 1½ cups cake flour
 * ½ cup granulated sugar
 * 1½ cups buttermilk at room temperature
 * 1½ teaspoons baking powder
 * 1 teaspoon cinnamon
 * ½ teaspoon salt
 * 4 cups fresh blackberries

Directions

 * 1) Melt butter in a glass square baking dish.
 * 2) Combine flour, sugar, baking powder, cinnamon and salt.
 * 3) Add buttermilk and stir until moistened.
 * 4) Spoon the blackberries over the batter.
 * 5) Do not stir.
 * 6) Bake in 325°F oven for 45 minutes.
 * 7) Serve warm with whipped cream.