Preheat oven to 180C/350F. Line two baking trays with parchment, or use a silicon matt like I do. In a large bowl, add all the ingredients, mix until combined until it forms a cookie dough. Form small balls about 1 teaspoon and leave just over an inch on all sides for spreading on your baking trays
Bake for 10-12 minutes until golden. Allow to cool on the tray for five minutes and then cool on a rack where they will crisp up even further. Melt the chocolate in a microwave. Add 1-2 teaspoons chocolate on one cookie, drizzle some sea salt on top ( optional) and sandwich two halves together with the melted chocolate.