Why is lemon zest used in arroz con leche recipe?

Arroz con leche is a Spanish rice pudding that typically includes milk, rice, sugar, and cinnamon. Lemon zest is not a traditional ingredient in arroz con leche, but it can be added for a touch of citrus flavor. The zest of the lemon adds a bright, citrusy flavor to the pudding. It also helps to balance out the sweetness of the sugar.