Marmalade is a special type of jam or fruit conserve marked by the presence of citrus peels. It’s something you’re more likely to find at the breakfast table than in a trendy bar, but it brings a unique mouthfeel and bittersweet tartness to the cocktails that call for it.
Orange is the most common flavor of marmalade, but it can be made from any citrus fruit, including kumquats, grapefruits, lemons, and so on.