Mix the softened butter in a stand mixer or with a hand mixer for 1 minute or until it's smooth.
Gently mix in the cranberry syrup. (https://www.krazykitchenmom.com/homemade-cranberry-syrup-and-cranberry-jam/)
Add the powdered sugar 1/4 cup at a time until fully mixed.
Continue mixing for 4-5 minutes until it's light a fluffy.