Dairy-free chocolate shortbread cookies with just 4 simple ingredients.
Preheat oven to 180°C/350°F (or 160°C/320°F if using a fan or convection oven) and line a tray with baking paper.
Cream together the butter and sugar until pale and fluffy.
Add in the flour and the cocoa powder. Mix until it begins to stick together then use your hands to press it into a dough.
Refrigerate the dough for 30 minutes. This will help the shortbread hold its shape in the oven.
Roll out the dough on a lightly floured surface to about ½-inch thick. Use a 3-inch cookie cutter to cut out the shortbread, re-rolling leftover pieces until the dough is all used up.
Bake for ~20 minutes until firm at the edges. They will still feel soft in the middle but if they look wet or greasy underneath then they need a bit longer.
Sprinkle some extra caster sugar over the shortbread and leave them to cool completely before enjoying.