Preheat oven to 375 degrees.
Melt chocolate in a double boiler. Add butter and sugar; melt over hot water stirring often. Beat eggs and add the milk and cornstarch. Mix well and add to the cooled chocolate mixture.
Pour the mixture to the unbaked prepared pie crusts. Bake for 20 minutes. Cool on the countertop on a wire rack for 20 minutes, then place the pie in the fridge to cool completely.
Once chilled, spread on the coconut pecan frosting and serve.