Surati Cake Rusk is similar to the Italian Biscotti and is best enjoyed with hot tea or cold drinks. Surati 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. 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. Since rusks are dry and hard biscuits, they are best dunked in some liquid, like milk, coffee or my favorite thing to pair them with is chai. It becomes soft and just melts in your mouth. Rusks have more calories than bread. The truth is, that 100 g of rusks have about 374-407 kcal. White bread has about 258-281 kcal, while whole wheat bread has about 232-250 kcal.