If you've purchased a package of mint, wash and strip leaves from stalks. You may choose to add the stalks as they will give extra flavor, but sometimes they are too hard to work with.
Reserve 4 – 6 large leaves and set aside. Gather your remaining mint leaves and with a sharp knife, chop finely.
Combine sugar with mint and mix very well. At this point, you may decide to put into a food processor for further incorporation, but be careful not to go too fine as it may turn into a paste from the moisture of the mint.
Into a large jar with a tight fitting lid, spoon about half of the sugar mixture into the jar. Take reserved mint leaves and place them flat on top of the sugar mixture. Continue to fill the jar with the remaining sugar mixture, close tightly and refrigerate.
This mixture can be made 1 day ahead of time and will last 1-2 days in your fridge.