Preheat oven to 325°F. Spray a 10-inch bundt pan with nonstick cooking spray. (Consider also lightly flouring the pan to ensure easy release, especially with chocolate-heavy batters.)
In a microwave-safe bowl, melt chopped chocolate in 30-second intervals, stirring in between each, until smooth. Or melt chocolate over a double boiler. Set aside to cool slightly, but still warm.
In the bowl of a stand mixer fitted with the paddle attachment, cream together the softened butter, cream cheese, and granulated sugar on medium-high until light, fluffy, and well combined, about 3 to 5 minutes.
Add eggs one at a time, beating well after each addition. Stop to scrape down the sides of the bowl as needed. Beat in the vanilla extract.
With mixer on low, slowly pour in the cooled melted chocolate. Mix until fully incorporated and batter looks smooth and chocolatey.
In a separate bowl, whisk together the cake flour, baking powder, cocoa powder, and salt.
Add about half the dry ingredients to the wet batter and mix on low until just combined.
Add the remaining dry ingredients and mix until no streaks remain; do not overmix. Scrape the sides and bottom of the bowl.
Gently fold in the chocolate chips.
Pour batter into the prepared bundt pan. Tap pan on counter a few times to release air bubbles.
Bake for 1 hour to 1 hour 15 minutes. Start checking with a toothpick at 55 minutes. The cake is done when a toothpick comes out with a few moist crumbs, but no wet batter. If the top browns too quickly, tent loosely with foil.
Let the cake cool in the pan for 5 to 10 minutes, then invert onto a cooling rack. Allow it to cool completely before adding the ganache glaze.
Ganache Glaze
Place the chopped chocolate into a heat-safe bowl. Set the bowl aside as you heat the cream.
In a medium saucepan over medium-high heat (or in a microwave-safe bowl if using a microwave), bring the heavy cream to a simmer, stirring occasionally. Be careful not to let it boil over or burn.
Pour the cream over the chocolate. Let sit 2 minutes, then stir until smooth. Stir in butter and salt. This makes about 1 ½ cups ganache.
Drizzle or pour the ganache* over the cooled cake. Let set slightly before slicing.
Notes
*If you have any extra ganache, spoon it over slices of cake or serve it with ice cream.