Warm egg yolk emulsion. The morning sauce.
One of Escoffier's five mother sauces. Butter, egg yolk, acid. It is what carries poached eggs onto the world stage.
Clarify 200g butter — melt gently, skim solids, pour off the golden liquid, discard whey.
Whisk 3 yolks + 1 tbsp water + 1 tbsp reduction over a barely simmering bain-marie until pale, thick, and doubled in volume.
Off the heat, dribble the warm clarified butter in a thin stream while whisking. Never rush.
Season with lemon, salt and the barest whisper of cayenne. Serve within 30 minutes.