Slatko is a Serbian fruit preserve that consists of distinguishable, usually whole pieces of fruit that are doused in a thick, sugary syrup. It can be prepared with various types of fruit such as quinces, watermelon rinds, cherries, raspberries, strawberries, blackberries, figs, grapes, plums, prunes, and even rose petals, while sugar-based syrups can often be flavored with vanilla, lemon juice, cinnamon, or cloves.
Serbian slatko, which translates as sweet, is a sign of hospitality that is traditionally offered as a warm welcome to guests. It is always served in small glass bowls and the guests should customarily enjoy only a spoonful of the preserve.