Double chocolate chip cookie sandwiches

1. In a mixing bowl, cream the butter and brown sugar together, scraping down the bowl throughout mixing.

Add the egg and vanilla and mix together.

2. In a separate bowl, sieve the flour, cocoa and baking powder. Add the dry to the wet ingredients and mix. Finally add the chocolate chips and mix until combined.

3. Divide this dough into 12 balls and place on two lined baking trays and flatten slightly with a clean hand.

4. Place in a preheated oven set at 180°C (160°C Fan/Gas 4) and bake for 15 minutes. Once baked, remove and allow to cool on the tray.

5. While cooling, for the buttercream, in a bowl beat the butter, icing sugar, cocoa powder and vanilla until smooth and creamy. You will need to scrape down the bowl at different stages.
6. Once the buttercream is ready, spread on the base of 6 cookies and top with another cookie and serve.