See the "Notes" section below for high altitude adjustments!
Preheat ovent o 350°F. Spray a 6 cup bundt pan with nonstick cooking spray and set aside (I like to use Pam for Baking for my spray).
Whisk the flour, cocoa powder, salt, baking soda and baking powder in a medium bowl and set aside.
In the bowl of a stand mixer fitted with the paddle attachment, or in a large bowl with a handheld mixer, beat the butter on medium-high for one minute. Scrape down the sides of the bowl and add in the brown and granulated sugars. Beat on on medium-high for 3-4 minutes until light and fluffy.
Reduce mixer speed to medium-low and add in one egg at a time, incorporating fully before adding the next. Scrape down the mixing bowl and add the vanilla. Beat on low until incorporated.
Turn the mixer to low speed and add half of the sour cream followed by half of the dry ingredients. Repeat with the remaining sour cream and dry ingredients. Mix until just combined, but do not overmix.
Remove the bowl from the stand mixer and pour in the hot coffee or espresso. Using a spatula, gently fold in the liquid with a few stirs.
Add in the chocolate chips and fold into the batter until just incorporated. Transfer the batter to the prepared bundt pan and smooth the top with a spatula. Bang the pan on the counter a few times to release any air bubbles.
Bake for 35-40 minutes. The cake is done when the top springs back when pressed and when a toothpick inserted into the center comes out with a few moist crumbs.
Let cake cool for 10 minutes on a wire rack. After 10 minutes, invert the pan onto the wire rack and lift the pan off. The cake should come out easily. Let cake cool for 1-2 hours before glazing.