Preheat oven to 180°c and line a baking tray with greaseproof paper.
Mix your nut butter, vegan butter and sugar in a food processor until thoroughly combined and smooth. Add your boiling water to the instant coffee and mix to make a thick paste. Then add it to the food processor with the milk, and continue to mix. Add in the cocoa powder, then slowly add in the flour, bit by bit, until combined and smooth.
Add the chocolate chunks and pulse a few times until it’s evenly mixed into the cookie dough.
Spread the mix into 8 equal sized servings and roll each one into a cookie shape with your hands.
Place on the baking tray and bake for 13-15 minutes for hard outsides and chewy centres. Place on a wire cooling rack to cool before serving.