Melt the butter and leave it to cool slightly.
Add both sugars and mix well.
Add the egg and stir until combined.
Add the flour, bicarbonate of soda and salt. Mix to form a dough.
Fold in the crushed chocolate.
Divide the dough into balls using an ice cream scoop.
Cook immediately or freeze the dough balls for later.
If frozen, let the dough soften slightly and flatten each ball before cooking.
Bake in the air fryer at 160°C for approximately eight to ten minutes, adjusting for your machine and cookie size.
Carefully transfer the cookies to a cooling rack and allow them to firm up.
