Mentioned by Hotspot-Hunter
London’s Best Cookies
"A thick, brownie-like cookie with sweet-and-sticky dulce de leche, toasted hazelnuts and cranberries, it’s luxurious – full of Valhrona chocolate – and super indulgent. 54 Greek St, London W1D 3DS or 49-50 Camden Lock Pl, London NW1 8AF. Open for take-away in the weekends."