Dubbed as the original and best for over 50 years, McVities Jamaica Ginger Cake is a moist, sweet loaf cake with a delicious ginger "kick" that is guaranteed to delight the taste buds.A loaf of McVities Jamaica Ginger Cake can be cut into 10 slices, each one containing 93 calories. This popular snack is perfect either on its own or with a layer of butter or margarine - and, of course, accompanied with a nice cup of tea.