Preheat your smoker or grill to 350°F (175°C).
In a large mixing bowl, combine the all-purpose flour, sugar, cocoa powder, baking powder, baking soda, and salt. Mix well.
In a separate bowl, whisk together the milk, oil, eggs, and vanilla until well combined.
Gradually add the wet ingredients to the dry ingredients, stirring continuously to form a smooth batter.
Stir in the boiling water until the batter is well combined. The batter will be thin, but that's okay.
Grease and flour two 9-inch cake pans.
Divide the batter evenly between the prepared pans.
Place the pans on the preheated smoker or grill and bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.
While the cakes are baking, prepare the chocolate ganache. In a mixing bowl, combine softened butter, cocoa powder, powdered sugar, vanilla, salt, and enough milk to achieve a smooth and creamy consistency. Mix well.
Once the cakes are done, remove them from the smoker or grill and allow them to cool completely.
Once the cakes are cool, spread a layer of chocolate ganache on top of one of the cakes. Place the second cake on top.
Use the remaining chocolate ganache to frost the entire cake, covering it with a delicious layer of chocolatey goodness.
Slice and enjoy your Smokin' and Grillin' Chocolate Infusion Cake with the perfect balance of rich chocolate flavor and a hint of smoky goodness.