Lemon sugar is a delicious addition to your pantry and can be stored for opportune times in the kitchen, such as when baking a delicious lemon loaf or creating cookies with a citrus tang. Zest an entire lemon peel into a bowl of sugar, using about 2-3 cups of sugar for every full lemon. Making a larger batch in advance will give the oils from the lemon more time to infuse their flavors with the sugar, making your recipes more flavorful.