TRS Butter Beans 2KG. Butter Beans are large, yellow-white beans that are a common part of the British diet. Like all beans, they are high in fibre, including soluble fibre. They are also a good source of protein. and low in fat. Butter beans have a creamy texture and taste, and can be served as an accompaniment to a sunday roast. They can be mixed with other beans and served as a base for a dish (rather like you would use pasta), or can be made into a curry. To cook butter beans, it is best to soak them for a few hours beforehand as this reduces the cooking time. They typically boil within 40 minutes, or around 15-20 minutes in a pressure cooker.