my mother's buttermilk pie

Ingredients For my mother's buttermilk pie

• 1/2 c

  pure butter
• 3 Tbsp

  self rising flour
• 3

  eggs slightly beaten
• 1 c

  buttermilk
• 1 tsp

  pure vanilla flavor
• 1 3/4 c

  sugar
• 1

  pie crust shell