Add the beans and vanilla into food processor and puree to a paste.
Pulse in the eggs and oil, and mix until well combined.
In a separate bowl, sift together the cocoa, baking powder, salt, and sugar.
Slowly mix together the bean mixture and cocoa mixture, until well combined, and stir in chocolate chips.
Pour batter into the greased baking dish, and bake for approximately 20-30 minutes (depending on size of pan, or until toothpick comes out clean when inserted in the middle.