Buttermilk Custard Pie

1 (9 inch) unbaked piecrust

2 Cups sugar

1 Tbsp. flour

2/3 Cups buttermilk

1 stick butter

1 tsp. vanilla

1/2 Tbsp. Cinnamon

1/2 Tbsp. Cardamom

4 eggs

Mix all ingredients and pour into the unbaked piecrust. Bake 45-50 minutes @ 350 degree oven.