Buttermilk Pie {marva merrill}

3 9" pie shells
1 1/2 cups melted butter
5 1/2 cups sugar
3/4 cups flour
9 eggs
2 1/4 teaspoons vanilla
1 1/2 cup buttermilk

Combine all ingredients in a bowl and mix.  Pour into pie shells.  Bake at 350 for 1 1/2 hours.  Remove from oven and sprinkle with cinnamon.  Allow to cool.  Top with frozen raspberries and whipped cream.