Instructions: On a small plate with a fork blend all ingredients together well and transfer to a sheet of wax paper. Using wax paper as an aid, shape butter into a 4-inch-long log and wrap. Chill butter 1 hour long, or until firm.

Bearnaise butter may be made 5 days ahead and kept chilled, wrapped tightly.

Prepare grill.

Bring steaks to room temperature and rub lightly with oil. Season steaks with salt and pepper and grill on a rack set 5 to 6 inches over glowing coals 4 to 5 minutes on each side for medium-rare meat. (Alternatively, steaks may be grilled in a hot well-seasoned ridged grill pan over moderately high heat.)

Serve steaks topped with slices of bearnaise butter.

Serves 4.

If you would like to email yourself the recipe for later use, or share the recipe with your friends or family, enter the email addresses below and this recipe will be emailed to you and others as well.