When soft add all ingredients to a bowl and mix (by hand or food processor) to incorporate.
Lay out a piece of parchment paper and form a butter log. Tightly roll and twist to seal. There may be some excess lime juice that won't incorporate. Don't worry about it, but put the log on a plate so it doesn't spill on your refrigerator.
Refrigerate for ~ 2 hours before using or freeze until ready to use. Happy buttery goodness! Beckie
Notes
Butters that are mixed with other ingredients are called compound butters.