Bake the pie crust until golden brown.

In a medium sauce pan, combine all dry ingredients and set aside.

Whisk together the milk and eggs. Combine with the dry ingredients, add melted butter. Mix well.

Cook over medium heat, stirring constantly until the mixture thickens and bubbles. Remove from heat; stir in the vanilla and mix well. Pour or spoon into the pie shell. Cool and serve. (Meringue top is optional)