Preheat the oven to 350 F. Grease one 9-inch cake pan and line it with parchment paper, or grease a mini Bundt pan with 8 molds, then place on a rimmed baking sheet and set aside.
In a large bowl, whisk together the dry ingredients.
In a medium bowl, whisk together the wet ingredients.
Whisk the wet mix into the dry ingredients until just smooth.
Pour the batter into the 9-inch cake pan or Bundtlette molds, and bake for 20-30 minutes, until the smell of chocolate fills your house and a toothpick tester comes out clean.
Transfer to a rack and let cool for 30 minutes. Invert the cake(s) onto a platter and let them cool completely.