Preheat the oven to 325 degrees F. Grease and flour a large bundt pan or tube pan. (Ours was 10 inches)
In a medium to large glass measuring cup or microwave safe bowl, heat the whipping cream until very warm/hot *but not boiling.*(Heat in 30-40 second increments, adjusting time as needed until hot).
Next, stir the cocoa powder into the heated heavy whipping cream to dissolve (you may prefer a whisk for this). Stir in the tablespoon of instant coffee/espresso granules (this is optional but deepens the chocolate flavor). Stir in the vanilla extract and peppermint extract. Set this mixture to the side to cool.
Flour Mixture: In a separate bowl add the flour, baking powder, and salt. Whisk to combine and set aside.
Next, add the butter to the bowl of your mixer, mixing on medium until smooth. Gradually add the sugar and mix on medium until fluffy and lightened in color, this will take 4-5 minutes.
Scrape the bowl down as needed. Mixing on low to medium speed, add the eggs one at a time, mixing to blend after each addition.
Time to put it all together! With the mixer on low speed, alternately add the flour mixture and the whipping cream/cocoa mixture. Begin and end with the flour mixture. (We do three additions of the flour mixture and 2 additions of the whipping cream mixture.) **Mix just until combined. Then, scoop the batter into the prepared pan.
Bake at 325 degrees for 1 hour and 10 minutes, or until a long wooden skewer or toothpick comes out clean or with just a few crumbs attached. Ovens bake differently so check at around the 1 hour mark and adjust the baking time as needed. (Also, if your bundt pan is smaller than ours, the batter will be deeper and therefore take longer to bake through).
Allow the pound cake to cool in the pan on a cooling rack for 5-10 minutes before turning out. Allow to cool before adding the glaze. (The chocolate glaze will become more thin if applied to a hot cake).