Preheat oven to 350. Grease a 9x13 baking pan with cooking spray.
Puree black beans with a little water. I went for a "smoothie" like consistency.
Add the sugar to the mixer or mixing bowl and then pour in the pureed black beans. Mix until smooth, adding the vanilla and milk as it mixes.
Dump in all the dry ingredients, flour, cocoa, powder, soda and salt.
Mix up, then toss in the coconut and chocolate chips.
On the lowest speed, mix in the coconut and chocolate chips for 10-20 seconds.
Pour the brownie batter into the greased pan and bake in the preheated oven for 35-45 minutes, or until toothpick comes out clean in the center. Let cool on a cooling rack before cutting.