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. In the UK, the name also refers to a wheat-based food additive. International variations Argentina In Argentina, rusk is called tostadas de mesa (literally "table toasts"), slices of twice-baked bread generally available in supermarkets in plain and sweetened variants. Cake rusk is called bay biscuit, its ingredients are egg, sugar, oil, self-rising flour, and vanilla. Azerbaijan Rusk is called sukhary ( – a loanword from Russian via Persian) in Azerbaijani. It is usually made from stale bread and buns. In Baku, some bakeries use their stale buns and bread for making rusks. The price of rusk in those bakeries is usually low, as the bakeries do this to avoid wasting the leftover bread and buns. Bangladesh It is commonly called "toast biscuit". Toast biscuits come in a variety of flavours, such as "ghee toast", "garlic toast", and "sugar toast", and are usually served with tea. Cake rusk is commonly known as "dry cake." Britain Butcher rusk is a dry biscuit broken into particles, sorted by particle size and sold to butchers and others for use as a food additive in sausage manufacture. Though originally made from stale bread, now called "bread-rusk", a yeast-free variety called simply "rusk" is now more commonly used. Various rusk particle sizes are used in the food industry, where uses include: A carrier for flavours, colours and seasonings A binding agent in hamburgers, sausages, stuffings, pies, and other compound meat products As an ingredient for dried stuffing mixes Farley's Rusks In the UK, Farley's Rusks are a dry teething biscuit dating from the 1880s, but manufactured by Heinz since 1994. They are usually given to infants, either soaked in milk and mashed up or in their original hard form as a teething aid. Cuba "Sponge rusk" is similar to biscotti but it is made out of twice-baked yellow cake batter. The yellow cake batter is baked into a flat, rectangular cake pan. After it is baked and cooled, it is sliced into strips and baked again or toasted to make cake toast. It is usually eaten with Cuban coffee (Cuban espresso) or as an accompaniment to ice cream, custard, or other dessert dishes. Denmark Tvebak is derived