Buttermilk, the ultimate rusk. As Ouma says, you don’t mess with a good thing. The rich and creamy buttermilk rusk is bursting with scrumptious flavor. With thanks to the Boer trekkers, who discovered a crunchy, tasty, long lasting snack that would stay fresh while they travelled from the Cape to the Transvaal. Rusks have since been an essential in South African households. Buttermilk Rusks 500g are melt-in-the-mouth delicious. Have one. Then have another, and another.