There are many butters from which to choose. Australian butters are usually a rich yellow colour. That’s because Australian milk is rich in beta-carotene (vitamin A) as cows are mostly pasture fed. By comparison, European butters are pale in colour as the cows are commonly grain-fed and often housed in barns for much of the year. The breed of cow and the time of year can also make a difference and adding salt tends to make butter more yellow.