Preheat oven to 350°F.

Using a medium saucepan, add butter and chocolate; place over medium heat and stir occasionally until melted.

In a separate bowl, whisk together eggs, sugar, vanilla and salt.

Add melted chocolate mixture; stir until well combined.

Place pie shell in pan. Pour batter into pie shell and bake for 30-35 minutes.

Let pie cool completely before serving. (Note: Pie can be refrigerated to speed up cooling process.)

{Optional} Serve with a scoop of vanilla bean ice cream.