Bring a half-filled medium pot of water to a slow boil.
In a large bowl, add egg yolks, Dijon mustard, horseradish, Worcestershire, water, lemon juice, and hot sauce, whisking until well incorporated.
Place the bowl over the pot of slow boiling water and continue to whisk until it starts to emulsify and become sauce-like. Alternate whisking on and off heat every 30 seconds to prevent eggs from scrambling.
Gradually add melted butter and continue to whisk on and off the heat until sauce becomes rich and ribbony with a sauce-like consistency, then season to taste with salt and pepper. Chef’s note: If sauce is too thick, add 1 tablespoon of water at a time and whisk until desired consistency is reached.
Wrap bowl with plastic wrap and keep warm until ready to serve.