Preheat the oven to 325°. Prepare a 10-inch Bundt pan by buttering well and coating with flour. Tap to remove excess flour.
In a medium bowl, whisk together the flour, cocoa powder, baking soda, and salt. Set aside.
In a mixing bowl, beat the butter and sugar, scraping down the sides as needed, for 6 to 7 minutes or until fluffy.
Beat in 1 egg at a time, mixing well after each addition and scraping down the sides often. Add the extract and blend until mixed.
To the batter, add the flour mixture alternating with the sour cream until completely mixed.
Transfer the batter to the prepared baking pan. Bake for 70 to 90 minutes or until a toothpick inserted in the middle returns clean.
Cool in the baking pan for 10 minutes on a wire before inverting onto the wire rack to cook completely.
Pour the heavy cream into a microwave safe container and heat on high powder for 1 minute or until steaming hot. Pour the cream over the chocolate chips and allow to rest for about 5 minutes to melt. Stir the chocolate chips until they melted and mixed into the cream.
Pour the glaze over the cake and allow it to cool slightly before slicing and serving.