Preheat oven to 375°F. Place baking sheet you will use to hold the pie on upper middle rack while preheating.
Cream together the brown sugar and butter until smooth then blend in the flour.
Mix in the corn syrup gradually.
Next, blend the espresso powder and hot water together. Blend it into the mixture along with the vanilla.
Mix in the eggs followed by the pecans.
Remove refrigerated pie crust and spread chocolate chips onto the bottom.
Pour filling slowly into pie crust. Remove baking sheet from oven and place the pie on it.
Bake pie for 45-50 minutes until the filling is puffed around the perimeter of the crust and set in the middle.
Remove pan from oven and transfer pie to cooling rack to cool completely.
When serving, top with whipped cream, if desired.