This recipe makes about ¾ cup of sauce.
Store the sauce in the refrigerator and consume within two days. If you need to reheat, do so slowly on low heat, preferably over a double boiler.
If you don't have a top-opening blender, use a whisk and mix manually with quick movements.
Keyword butter and egg yolk sauce, french sauce, hollandaise sauce, poached egg sauce, salmon sauce, yellow sauce