Preheat oven to 375 degrees.

In a small bowl, combine the flaxseed and water. Let sit for 5 minutes.

In a standing mixer fitted with a paddle attachment, cream together the butter and sugars.

Add in the flax mixture, eggs, banana, vanilla, cinnamon, flour, baking soda, salt, Brewer's yeast and oats.

Stir the chocolate chips in by hand

On a rimmed cookie sheet fitted with parchment, drop the dough by the tablespoon at least 2-inches apart.

Bake for 9-10 minutes, or until golden grown. Let cool on a metal cooling rack.