Preheat oven to 400 degrees.
Melt butter and chocolate chips in a double broiler and set aside to cool.
Mix next 4 ingredients in a separate bowl.
Mix eggs, milk and vanilla together and then combine with the dry ingredients and then the chocolate
Pour in a pre-baked pie crust.
Bake on the middle oven rack for 40-50 minutes.
Cool for an hour once you pull it out of the oven before cutting so it can set.
Serve room temp or refrigerated.