I already cut you a big slice and drizzled it with my my simple go-to chocolate glaze (which you probably remember from this amazing grain-free cake recipe).
3/4cupbuttermilk3/4 + 1 TB lemon juice will work as a sub for buttermilk. Allow the milk and lemon juice to sit on the counter for 5 minutes before using.
In a medium-size saucepan over medium-high heat, bring the brewed coffee and cocoa powder to a slight boil (not a full boil, just starting to bubble), whisking every few seconds to prevent burning. Once the mixture reaches a slight boil, turn off the heat and set aside. The mixture will thicken as it sits.
Fit a stand-mixer (like this) with the whisk attachment or use a hand-mixer (like this).
In the bowl of the mixer, add the honey, baking soda, salt, and eggs. Beat the mixture for 2 minutes on medium speed.
Add the melted butter, buttermilk, and vanilla extract. Continue to beat for another 2 minutes. Beating the batter is the key to produce a moist, perfectly-raised cake! Turn off the mixer.
Before moving on to the next step, press the shredded zucchini in between two paper towels or a folded dish towel, squeezing out any excess water.
Turn the mixer on to medium speed and add the shredded zucchini, crushed walnuts, and flour (a cup at a time). Beat for 1 minute. Then, add the coffee and cocoa mixture. Beat for 2 minutes.
Butter a bundt pan (like this) and sprinkle a small amount of flour over the buttered pan. Spread the flour over the buttered pan so there's a very light, thin coating of flour (this will make the cake easy to remove after baking).
Pour the batter into the bundt pan and bake for 50-60 minutes.
Remove the cake from the oven and allow to cool for 10 minutes. To remove, simply flip the bundt pan over and the cake will pop right out.
For the chocolate glaze, in a medium-size saucepan over medium heat, melt the chocolate chips and cream. Once melted, whisk in the honey. Remove the pan from the heat and stir in the vanilla extract. Allow to cool for 4-5 minutes.
Pour the glaze over the top of the cake and top with crushed walnuts (if desired).