More mousse than brownie, Leon's offering (recommended to me by my friend Nicole) has the depth and bitter orange flavour of a dark Terry's chocolate orange and the moist, rich texture of a torte or a crumby mousse (and it glistens damply in the light). It has soft walnuts and plenty of orange zest to chew on.Orange and walnuts is an interesting mix and I think it works - the nuts seem to be there more for texture than for flavour as the orange is definitely the main player in this brownie. It's a shame it's packaged in plastic - it doesn't look very appealing at all, but I suppose that makes them stackable, Pret-style, on the shelves by Leon's till, and it indicates it's almost certainly not home-made. I like its chocolatey punch, and the addition of orange, but I don't think it's anywhere near the best brownie I've tasted (sorry Nicole!) so I'm going to give it a 3.5/5.