Reducing Flour for Chocolate Dough

Agree with drbabs recommendations.
Keep in mind both the cocoa powder and flour are powders, but they have different properties.
The previous hotline discussion she linked to is very informative.

I think it’s something you’re going to have to experiment with. There was a discussion about this on Hotline a while back. Here it is: https://food52.com/hotline/19632-using-cocoa-in-place-of-flour

Maybe best to use a tested recipe for chocolate cookies, and add spices if you like. https://food52.com/recipes/8088-holiday-sables
https://food52.com/recipes/82209-salted-double-chocolate-chewies-recipe
https://food52.com/recipes/25372-pierre-herme-dorie-greenspan-s-world-peace-cookies