In Scotland, Tiffin refers to the delicious traybake made of crushed biscuits, butter, sugar, raisins (sometimes cherries) and topped with a layer of melted chocolate. Rumour has it (aka, Wikipedia) that the chocolate tiffin recipe originated in Troon in Scotland in the 1900s, although I haven’t been able to find anything to substantiate this. You might sometimes see it called “fridge cake” as this simple recipe requires no actual baking. Instead, you mix all the ingredients together before allowing it to chill in the fridge. It’s also known as icebox cake, chocolate concrete cake, and no-bake chocolate biscuit cake.