Use a microplane or fine grater and apply light pressure, only removing the colored outer layer of the citrus peel. Rotate the fruit frequently to avoid digging into the bitter white pith.
Zesting citrus fruits involves removing the outermost layer of the peel, which contains flavorful oils. The key to avoiding the bitter white pith (the albedo) lies in technique and the right tool. Here's a step-by-step guide:
Choose the Right Tool: A microplane zester is ideal because its fine blades shave off thin layers. A citrus zester with small holes also works, but requires more care.
Wash and Dry the Fruit: Thoroughly wash the citrus fruit to remove any dirt or wax. Dry it completely, as a wet surface can make zesting more difficult.
Apply Light Pressure: Hold the zester firmly and run the fruit across the blades with light, even pressure. The goal is to remove only the colored part of the peel.
Rotate the Fruit: After a few strokes, rotate the fruit to a fresh, unzested area. This prevents you from repeatedly zesting the same spot and accidentally digging into the pith.
Check Your Work: Periodically check the zest to ensure it's free of white pith. If you see any, discard it.
Freeze citrus fruits for about 10-15 minutes before zesting. The slightly frozen peel becomes firmer and easier to zest without accidentally grating the pith.