In a medium bowl, mix the softened butter with garlic, parsley, thyme, lemon zest, salt, and pepper until fully combined.
Place the butter mixture onto a piece of plastic wrap and roll it into a log. Twist the ends tightly and refrigerate for at least 30-60 minutes or until it becomes firm.
Remove the plastic wrap and slice the butter log into rounds to place on your cooked steak just before serving. The butter will melt over the top of the steak as you eat it.