Position a rack in the center of the oven and preheat to 325ºF [160ºC]. Butter and flour a 10-inch 12-cup [25 cm – 2.9L] nonstick Bundt pan.
In a medium bowl, whisk together the flour, baking soda, and salt together. In the bowl of a stand mixer fitted with the paddle attachment, or in a large bowl with an electric mixer, mix the butter and cream cheese on medium speed until light and creamy, 2 to 3 minutes. Add the sugar and ground espresso and turn the mixer up to medium high. Mix for 3 to 5 minutes, making sure to scrape down the bottom and sides of the bowl with a rubber spatula periodically. The butter and sugar should be light and fluffy.
Add the eggs one at a time, mixing for about 30 seconds after each addition. Periodically stop the mixer and scrape the bottom and sides of the bowl to ensure even mixing. Add the vanilla and mix until combined.
On low speed, add the milk, followed by half the flour mixture, and mix until just combined. Add the brewed espresso, and then the remaining flour mixture, and mix until just combined. Remove the bowl from the mixer, add the chopped chocolate, and give the mixture a few more turns with a spatula to make sure it’s combined completely. Pour the batter into the prepared pan. Tap the pan lightly on the counter to remove any large air bubbles.
Bake the cake until it is golden and a cake tester inserted in the center comes out clean, 45 to 65 minutes, depending on the pan. Let the cake cool in the pan for 30 minutes, then carefully un-mold it onto a rack to cool a bit more before glazing (I often chill the cake in the refrigerator overnight, wrapped in plastic, before glazing).