Lantmännen Unibake UK has added a Gourmet Burger Bun to its Americana range of fast food breads. The Kaiser Bun features a subtle sour flavour and a slightly firmer texture, finished with a maize dressing, according to the firm. It has been designed to cater for operators of any kind looking to develop a more premium hamburger offering. The buns are pre-sliced for convenience and are available in packs of 6x8.