If you are looking for a sugar substitute, you can use honey in your simple syrup for this recipe. Just combine 2 cups honey with 2 cups water in a saucepan over medium heat to make the simple syrup and use as much as you would like to sweeten your lemonade. Other sugar substitutes would be 1/4 cup stevia or 1 to 1 1/2 cups monkfruit in place of the 2 cups of sugar.