Organic dye-free coconut cotton candy adds a tropical note to this lemon-drop martini.
Make lemon simple syrup: Combine sugar, 1/4 cup water, and lemon peel in a small saucepan. Bring to a boil; remove from heat and let steep for 5 minutes. Remove peel and refrigerate syrup until completely cool.
In a 2-quart pitcher, combine lemon syrup, limoncello, vodka, and lemon juice; stir and divide among six martini glasses.