Prepare flax egg. Mix together the hot coffee and ground flaxseed. Set aside for 10 miniutes.
Preheat oven to 350° and prepare a 9x9 pan with parchment paper, allowing for a couple of inches to hang over two sides. (See photo in the blog post.)
Microwave 1/2 cup of the chocolate chips along with the 1/2 vegan butter on high for one minute. Give it a stir. If the chips are not yet melted then continuing microwaving for up to 30 seconds more in 15-second increments. Set aside.
Mix together the dry ingredients, making sure the brown sugar clumps and cocoa powder clumps are broken up.
Add in the flax egg, melted chocolate, and vanilla. Mix together until all dry ingredients have been moistened.
Pour into the prepared pan, spreading smoothly.
(Optional) Sprinkle a handful of chocolate chips on top for a finished pro look.
Put the brownie pan onto a baking sheet and put it in the oven.
Cook for 40 minutes. The brownies will not look done. Take them out anyway!
After 20 minutes, using the sides of the parchment, lift the brownies out of the pan in one piece and onto a cooling rack. Allow to fully cook - about 2 hours. Cut into 16 squares.