In a bowl stir together the flour, icing sugar and salt.
175 g plain flour, 50 g icing sugar, 1/2 tsp salt
Rub the cold butter into the flour mixture until it is combined and no large chunks of butter remain.
150 g vegan block butter
Stir in the chocolate chips.
75 g 70% dark chocolate chips
Bring the mixture together into a ball, flatten slightly and cover in a reusable wrap. The mixture should come together when squeezed between your fingers. If for any reason it does not then add 1/2 tsp of cold water, mix in and then try again to bring the mix together.
Place the cookie dough in the fridge for 45 minutes.
Preheat the oven to 170°C fan (190°C conventional / 375°F / gas mark 5).
Lightly flour a smooth surface and a rolling pin. Roll the cookie dough out to 1cm thick and cut out 12 x 6cm (2.5”) rounds.
Place the cookies on a lined baking tray and sprinkle the tops with caster sugar.
25 g caster sugar
Bake the shortbread cookies for 13-15 minutes until they are just starting to colour. Remove the baking trays from the oven and set them aside. Leave the cookies on the trays for 10 minutes to cool slightly before transferring them to a cooling rack to finish cooling.