Preheat oven to 350 degrees F. Generously coat a 10-cup bundt pan with baking spray that contains flour, or grease and flour the bundt pan. Then place the pan in the freezer while you prepare the cake batter.
In a medium bowl whisk together the all-purpose flour, dutch processed cocoa powder, baking soda, baking powder, granulated sugar, and kosher salt.
1 1/2 cups All-purpose flour, 3/4 cup Dutch-process cocoa powder, 1 1/2 tsp Baking soda, 3/4 tsp Baking powder, 1 1/2 cups Granulated sugar, 1 tsp Kosher salt
In a large bowl whisk together the buttermilk, eggs, coffee, oil, and vanilla extract.
3/4 cup Full fat buttermilk, 2 large Eggs, 1 cup Strong black coffee, 1/4 cup Vegetable oil, 1 tsp Vanilla extract
Stir in the dry ingredients until combined. Do not overmix, the cake batter will be thin. Pour the cake batter evenly into the prepared bundt pan. Lightly tap the pan on the counter to remove excess air bubbles from the bottom of the cake.
Bake for 40-50 minutes or until a toothpick inserted into the center comes out clean. Let the cake cool in the pan for 15 minutes, then carefully invert it onto a wire rack or serving plate to cool completely.