My favourite ice cream as a child was, without fail, mint choc chip. The lurid green ice flecked with chocolate pieces, it was the stuff of dreams and, no doubt, started what remains a life-long obsession with chocolate and mint flavours together. From the punch Bendick’s Bittermint to the easy going After Eight, combine those flavours together and I am a happy girl. However, being intolerant to lactose means that I can no longer grab a mint choc chip cornetto or, even crunchier, a slice or two of Vienetta for a creamy, frozen, choccie-mint treat. And that could only mean…