Preheat your oven to 325 degrees.
Combine the flour, salt, cocoa, powdered sugar, and baking powder in the bowl of an electric mixer fitted with the paddle attachment. Give it a slow mix.
Add the butter and stir until pea sized clumps are formed in the dry ingredients.
In a separate bowl mix the honey and milk until the honey dissolves. Stir into your dry ingredients until a dough forms. Split dough into two.
On parchment cut to the size of a cookie sheet (or a silicone mat) roll the dough into a large rectangle. Prick with a fork to prevent bubbling. Bake for 12-15 minutes, or until you start to smell chocolate.
Immediately cut into squares or desired shape. Make sure you do this while they are warm as they will crisp up fairly quickly as they cool.