White Kendal Mint Cake Commonly known as “The original energy bar” white Kendal mint cake made its appearance over a century ago. In simple terms it is a sugar candy bar that is flavoured with mint….in reality it is a tasty candy bar that is sought after by Hill Walkers, Mountaineers and other endurance athletes. It is made from Sugar, Glucose, Fondant, Peppermint Oil and a small amount of Salt.