To make the perfect jacket potato you are looking for a potato that is flavoursome, floury (for that fluffy centre) and grows to a good size. There are a few varieties that gardeners and mass producers prefer such as Vivaldi, Melody, Russet and King Edwards. However most supermarkets have taken away the guess work and offer pre-packaged 'baking potatoes' which are of the best size and have the right properties for making jacket potatoes.