Preheat your oven to 325 degrees Fahrenheit. Then, grease and flour a 10-inch bundt pan.
Cream the butter, sugar and brown sugar together in a stand mixer fitted with a paddle attachment. Beat until the mix is very light and fluffy.
1 ½ cups butter, softened, 2 cups sugar, 1 cup brown sugar
Add the eggs to the butter mix, adding them one at a time and scraping down the sides of the bowl after each addition. You want to be sure all the eggs and butter are blended together evenly.
5 eggs
Add the vanilla to the bowl and mix again.
1 Tablespoon vanilla extract
In a separate medium sized bowl, mix together the flour, cocoa powder, baking powder and salt.
2 cups flour, ¾ cup unsweetened cocoa powder, ½ teaspoon baking powder, 1 teaspoon salt
In a separate small bowl, combine the buttermilk and brewed coffee.
1 cup buttermilk, ½ cup brewed coffee
Add about ⅓ of the flour mix to the bowl of the stand mixer and mix it into the egg and butter. Then, add about ½ of the buttermilk mix and mix again. Continue to alternate between adding the dries and the wet ingredients to the bowl until everything is combined and the chocolate batter is nice and smooth.
Pour the batter into the greased bundt pan then bake the cake for 60 minutes. Check to make sure the cake is fully baked by sticking a toothpick in the center of the cake. It should have no sticky batter on it when it comes out.
Let the pound cake cool in the cake pan for at least 30 minutes. Then, flip the cake out of the pan and on to a plate. Slice and enjoy!