Preheat oven to 350°F and line an 8.5x11 baking dish with parchment paper.
In a large bowl, mix together the almond flour, cassava flour, arrowroot, baking soda and salt.
Add in the almond butter, maple syrup, vanilla and eggs until a smooth batter is formed.
Fold in chocolate chips and pour the batter into the prepared baking dish using a spatula to evenly distribute the batter.
Bake at 350°F for 25 minutes or until a toothpick comes out clean. Allow the cookie bake to cool in the pan for 10 minutes before slicing.
While the cookie bake is cooling, melt 1/4 cup chocolate chips over a double broiler. When the cookie bake is cool to the touch, use a spoon to drizzle chocolate over the top. Enjoy!
Notes
While I haven't tried it and can't guarantee the results, you could probably cut this recipe in half and bake it in an 8x8 pan.