Zest provides a concentrated burst of citrus flavor without adding extra liquid or altering the texture of the dish, unlike citrus slices.
When a recipe calls for citrus flavor, the choice between zest and citrus slices depends on the desired outcome. Zest, which is the colorful outer layer of citrus fruit, contains highly concentrated oils that are packed with flavor. Adding zest allows you to infuse the dish with a bright, aromatic citrus essence without introducing additional moisture. This is particularly important in recipes where maintaining a specific consistency is crucial, such as baked goods, dry rubs, or sauces that shouldn't be diluted.
Citrus slices, on the other hand, contribute both flavor and liquid. While they can be used to impart a subtle citrus note, they also add volume and can potentially change the texture of the dish. For example, adding citrus slices to a cake batter could make it too wet, affecting its rise and overall structure. Similarly, in a marinade, citrus slices might dilute the other flavors.
Therefore, zest is preferred when you want a potent citrus flavor without altering the liquid content or texture of the recipe. Citrus slices are more suitable when you want a milder flavor and are willing to adjust the recipe to accommodate the added liquid.
When zesting citrus, avoid grating the white pith underneath the colored peel, as it is bitter and can negatively impact the flavor of your dish. Use a microplane or zester to remove only the outermost layer.