This holiday season, Shake Shack is celebrating with the launch of a new festive menu. Available at all UK Shacks from 15th November, this limited time menu will feature a new Raclette Burger that’s already generating anticipation! Christmas will be coming even earlier for long-time Shake Shack fans too – the fast food favourite is bringing even more Holiday cheer with the return of two fan favourite hand-spun Holiday Shakes,…