In a large bowl, add almond butter, syrup, and cocoa powder. Stir until all ingredients are completely mixed together. Add in oat flour and stir until evenly combined. Add the vanilla extract and espresso powder.
Using your hands, roll out balls of cookie dough and place them on the lined sheet. Press down on each one into a cookie shape, using a fork to cross both sides.
Refrigerate for 30 minutes to firm up.
Whisk together the sugar, cocoa powder, and espresso powder.
Remove the cookies from the fridge and sprinkle the powdered topping over each one.