Preheat oven to 350 degrees.
In a food processor, combine dark chocolate and cocoa powder. Pulse until the mixture is course, like small pea sized. It will take a minute.
Add the baking soda, baking powder and dates. Process until the dates become soft and puree like, it will take another minute or so.
Make the flax eggs, by combining the flax and water and let sit for a minute until it thickens.
Add the flax eggs, coconut oil, vanilla, salt and instant coffee to the food processor, and continue to process mixture for a few minutes until it starts to come together and looks like a wet batter. It should still be pretty thick, but you want to make sure there are no large pieces of anything, and it looks pretty evenly combined.
Scoop into an 8x8 baking dish lined with parchment paper. Press out so it is even.
Bake at 350 for 30-35 minutes.
Let cool completely, serve!