WHIP butter with a mixer until smooth and creamy. Add remaining ingredients to butter and mix well.
TRANSFER butter mixture to a sheet of parchment paper. Roll into a tube about 1 1/2" in diameter and twist the paper at the ends. Refrigerate for 4-6 hours. Butter can be stored in refrigerator for up to 1 week. For longer storage, the butter can be frozen.
TO SERVE: Place a slice of butter on top of the steak immediately after removing it from the cooking surface while the steak is resting. Butter will be soft and slightly melted when the steak is served.