Crispy Coconut Cake Rusk is a popular any-time snack that is loaded with coconut. Cake Rusk is similar to the Italian Biscotti and is best enjoyed with hot tea or cold drinks. This special cake rusk is crispy yet soft and has the incredible flavor of coconut added. Cake Rusk is a popular any-time snack that started it all for Crispy. No one has quite been able to match that taste ever since. Coconut variety features real desiccated coconut that is sure to win the hearts of coconut lovers. A rusk is a hard, dry biscuit or a twice-baked bread. It is sometimes used as a teether for babies. In some cultures, rusk is made of cake, rather than bread: this is sometimes referred to as cake rusk.