Take your steak to a new level of luxury with a creamy, decadent Bearnaise Sauce for Steak!
Heat a pan, and add in the vinegar, shallot, black pepper, and tarragon. Let simmer 10-15 minutes. Set aside.
In a saucepan, heat water. Take a metal mixing bowl and combine in it the cooled herb reduction, egg yolks, and a splash of water.
Place the mixing bowl on top of the water-filled pan, making sure the water doesn't touch the bowl.
While whisking continuously, add in the butter 2-4 tablespoons at a time. Whisk until fully melted before adding more butter.
Once the sauce is at your desired level of thickness, remove from the heat and pour into a gravy boat. Drizzle over steak, and serve!