Begin by chilling your martini glass or glasses for 30 minutes
If you are choosing to rim the glasses set out 2 small plates
On one plate pour out some simple syrup
On the second plate pour granulated sugar and the zest of a lemon
Rim the top edge with simple syrup
Then dip the rim in the sugar and lemon
Add a half lemon slice for garnish if desired and set aside
Fill a cocktail shaker with ice
Pour in
3 oz Rum Chata liqueur
and
1 oz Limoncello liqueur
Place the lid firmly on the shaker and shake vigorously for 30 seconds until fully chilled