Chef John’s “State Fair” Lemonade
This lemonade recipe is for real, authentic, vintage lemonade —the kind you might enjoy on a hot summer day at one of those stands at the state fair. Most of us make lemonade just out of lemon juice, but as you may know, the oils in the lemon peel contain a tremendous amount of flavor, and once you drink this, you won’t want to go back to drinking it how you used to.
https://www.allrecipes.com/recipe/281089/state-fair-lemonade/
In this case, it`s just sugar and citrus peels. The sugar pulls the oils out of the peels, and you end up with oleosaccharum, which is then added to the lemonade.