This is another Christmas favorite at my house

1 9 inch Pie Crust

1/4 tsp cinnamon

1 cup plus 1 tablespoon sugar

4 tablespoons butter, melted and cooled

1 1/2 cups buttermilk

4 large egg yolks

1/4 cup all purpose flour

1 teaspoon vanilla extract

Preheat oven to 350 F.  Set a rack in lower third of oven.  Line a baking sheet with foil or use a disposable aluminum pan, set it on oven race.

In a small bown stir together cinnamon and 1 tablespoon sugar.  In a large bowl whisk together melted butter, buttermilk, egg yolks, flour, vanilla and remaining sugar.  Pour into pie shell and sprinkle with the cinnamon/sugar mixture.

Set pie on preheated baking sheet and bake for 2o minutes.  Without opening oven turn oven down to 325 F and bake until pie is set, puffy and golden (about 20 more minutes).  Let cool on wire rack, then serve warm or chill to serve cold.