Preheat oven to 350F.
Whisk together wet ingredients (first 5 ingredients).
Stir in the cooked quinoa.
In a separate bowl, combine the dry ingredients leaving out the chocolate.
Mix the dry ingredients into the wet ingredients.
Gently stir in the chopped dark chocolate.
Using a large cookie scoop (1/4 cup sized scoop), scoop the cookie dough onto a parchment lined cookie sheet. Make sure to firmly press the dough into the cookie scoop using the side of your bowl. This will ensure that your cookies hold together nicely. Since these are pretty big cookies, I recommend using two cookie sheets.
Using a fork, lightly press down the cookies using a crisscross pattern.
Bake for 15 minutes, or until the edges are golden brown.
Let cool on the cookie sheet for about 10 minutes.
Transfer to a cooling rack until cooled completely.