Preheat oven to 325 degrees
Line muffin tins with muffin papers
In a small bowl whisk together melted butter, cocoa, and boiling water, set aside to cool
In a separate larger bowl, whisk together buttermilk, eggs, baking soda, and vanilla
Add in flour, sugar, and spice
Drizzle in the butter cocoa mix, then stir in the buttermilk mixture, and finally add the soda and stir until well combined
Fill the muffin tins and bake about 18 minutes or until toothpick comes out clean
Let cool completely before frosting