1Place the butter in a medium bowl and mash it with a rubber spatula until it’s very spreadable. Add the remaining ingredients and mix until thoroughly combined. Transfer to a serving bowl and serve immediately.
2Alternatively, to serve this compound butter as a sliceable stick, transfer the butter mixture to a sheet of plastic wrap. Shape it into a log by rolling it up in the plastic wrap, then twist the ends to seal. Place in the refrigerator to harden, at least 30 minutes.
Baking recipes often call for softened butter, but if you put the butter in the microwave you risk butter soup. Leaving it out at room temp is fine if you've got lots of time. But when your butter is cold and hard and you want it to be warm and soft, just pound it with a rolling pin.