1. Preheat your oven to 350°F (175°C) and grease a bundt pan thoroughly.
2. In a mixing bowl, whisk together cocoa powder, flour, baking soda, and salt.
3. In another large bowl, beat butter and sugar until light and fluffy.
4. Add eggs one at a time, mixing well after each addition.
5. Stir in vanilla extract and orange zest (if using).
6. Mix in sour cream for extra moisture and richness.
7. Gradually add dry ingredients to the wet mixture, alternating with hot coffee.
8. Fold in fresh or frozen cranberries, nuts, and chocolate chunks or chips.
9. Pour the batter into the prepared bundt pan, spreading evenly.
10. Bake for 65-75 minutes or until a toothpick inserted comes out clean.
11. Allow the cake to cool in the pan for 15-20 minutes before inverting onto a wire rack.
12. While the cake cools, prepare sugared cranberries by coating them in simple syrup and rolling in sugar.
13. Once the cake is fully cooled, drizzle it with chocolate ganache.
14. Decorate with sugared cranberries and additional nuts, if desired.
15. Let the ganache set before slicing and serving.