In a stand mixer, add the brownie mix and water/oil the box suggests and mix.
Add in egg, Brewer's Yeast, flaxseed, and water, then mix. The consistency should be a little thicker than you are used to. Pour the ingredients into a greased baking dish and spread. Add the chocolate chips or chocolate syrup on top. This is a great place to let a kiddo help you with arranging the chocolate chips/syrup and making sure there is enough for the whole family to be happy!
Bake according to the box directions.
Enjoy!