Wash and dry your fruit to remove any waxy coating. While the waxy coating will actually help protect them in the freezer, you don’t want to have to worry about the waxes later if you plan on zesting your fruit straight from the freezer.
Place the whole citrus fruit in a heavy duty freezer bag and seal it up tight. Air exposure is the enemy when it comes to freezing food because it sucks out moisture and deadens flavors.
Freeze the citrus. There is no exact cut off date for how long the citrus will last in your freezer. Instead, they will just slowly dry over time. Over a long time. Like months. If and when the peel begins to dry out, the zest may not be as flavorful, but the juice inside will still be quite usable. That being said, I usually try to use up my frozen foods within three months to ensure optimum quality.
To use the frozen fruit, remove it from the freezer bag and zest the fruit while frozen solid. Once zested, thaw the fruit through by either microwaving for 15-20 seconds, or running it under warm water. Once thawed, slice in half and squeeze the juice as usual. The juice should flow from the citrus quite easily.
