Stir with a fork to evenly distribute the lemon zest.
Store the lemon sugar in an airtight container at room temperature for up to 6 months.
Notes
The sugar will become a bit moist from the essential oils in the lemon peel. The sugar will absorb the moisture and become a bit...crisp. This is to be expected and actually gives a nice crunch when used to top baked goods.
This recipe can be altered by using a variety of citrus fruits instead of lemons: lime sugar, orange sugar, and grapefruit sugar are all different flavors you can make using this basic recipe.