Slatko (Serbian: слаткō, meaning "sweet") is a thin fruit preserve made of fruit or rose petals in Serbian cuisine. Almost any kind of fruit can be used, like wild strawberry, blueberry, plum and cherry. Traditionally, honored guests in a Serbian home are greeted with a spoonful of slatko and a cup of water.
Slatko is ideal as a topping for ice cream, waffle shortcakes and as a filling in pancakes.
The most usual types of slatko are those made of whole strawberries, slightly unripe skinned plums or sour cherries. Other fresh fruits like raspberries, sweet cherries, watermelon cubes, rose petals, quinces, grapes, figs, skinned apricot halves or quarters, peaches, blueberries, blackberries or redcurrants can also be used. If a plum slatko is prepared, walnut halves may be added to the mixture or even inserted into the plums themselves to replace the pits. Frozen berries and fruits may be used as well, but the amount of water and the cooking time should be adjusted accordingly.