Allow the butter to come to room temperature before starting.
1 cup salted butter
Into the bowl of a mixer fitted with a paddle attachment, add the room temperature butter.
Beat the butter until creamy, then add in the parsley, red pepper flakes, black pepper, minced garlic, lemon juice and zest.
1/4 cup fresh parsley, A pinch of red pepper flakes, coarsely ground black pepper, 2 teaspoons fresh garlic, juice and zest of ½ lemon
Mix until well combined.
Scrape down the sides of the bowl and turn the mixture out onto a piece of parchment paper.
Using the back of a spatula, spread out the mixture into a log shape.
Roll the parchment paper up and twist the ends like a piece of candy.
Refrigerate the log of butter for at least 4 hours to allow the flavors to come together.