How to Make It
In a medium heatproof bowl set over (but not in) a large saucepan filled with 2 inches of simmering water, whisk the egg yolks with the cold water and salt until warm to the touch. Slowly drizzle in half of the melted butter in a thin stream, whisking constantly until incorporated. Continue whisking in the melted butter until the sauce is thick and emulsified. Whisk in the lemon juice, hot sauce and Worcestershire and serve warm.