Preheat oven to 350*
Combine sugar & butter and beat until fluffy
Mix together flour, baking powder, salt, & cinnamon, set aside
Mix the RumChata & vanilla together, set aside
Alternating, add in the flour mixture and RumChata mixture in to the butter and sugar. Start and end with the flour mixture.
In a clean mixing bowl, beat egg whites until soft peaks form (this will be easiest in an electric mixer)
Fold egg whites in to the batter – do not do this in an electric mixer, use a spatula
Fill cupcake liners
Bake for 20 minutes or until cake “bounces back” when touched.