Whisk the egg yolks and vinegar together in a bowl. Bring a pan of water to the boil.
Hold the bowl above the pan of simmering water and whisk continuously as you add small amounts of butter at a time.
Continue to whisk over the pan of water until all the butter has been added and emulsified into the mixture. The sauce will thicken and become creamy. Set aside until ready to use (you will notice it thickens further on standing).
Notes
Delicious served over my Keto Salmon Eggs Benedict.*A new-and-improved version of this delicious recipe features in my cookbook KETO KITCHEN. My name is Monya Kilian Palmer. If you loved this recipe, please follow and tag me @mkilianpalmer on Instagram so we can all see your lovely creations!* * *